Vehicle speed sensor help requested. Used (4.10 diff install)
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Vehicle speed sensor help requested. Used (4.10 diff install)
first off, the diff came from a guy local to me who got it from corvettes of houston. he stated his speedo didnt work when he had it in either. When i first put the diff in w/ the speed sensor included, the speedo wouldnt read any mph until about 5-10 mph then it'd jump up around until 30 when it read the correct spead steadily. Today i decided to take the known good speed sensor out of my 3.42 diff and try it. Now it doesnt read till at least 20 but when it does read it reads steadily starting at 1 on up. It wont register until im going at least 20 though. I did notice that the diff i got in there now has a recess machined into it for an O ring on the rear most cover where as my original did not. perhaps the original speed sensor in the 4.10 rear was going bad and mine from my 00 3.42 is a different calibration or something for an older rear end? I know one guy on this board had his gears done at Speed inc and he had the same problem, but speed inc just swapped the whole carrier, this is not an option for me. BTW, the speedo worked perfectly fine prior to this gear swap. Any/all help is greatly appreciated.
thanks
dave
[Modified by TT_Vert, 10:04 PM 4/15/2004]
thanks
dave
[Modified by TT_Vert, 10:04 PM 4/15/2004]
Race Director
Joined: Sep 1999
Posts: 12,437
Likes: 918
From: CONCORD NC
Re: Vehicle speed sensor help requested. Used (TT_Vert)
sounds like a problem with the pickup on the gear itself. I ran a 4.10 from Corvettes of Houston, and mine worked fine.
I wonder if they got a batch of bad 4.10's??!!
I wonder if they got a batch of bad 4.10's??!!
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (davidfarmer)
the pickup is on the gear or the carrier?
i would think if it was the gear (rather then the speed sensor) that both speed sensors would react the same way. In wondering if they used a revised part in later rear ends?
Dave
[Modified by TT_Vert, 11:40 PM 4/15/2004]
i would think if it was the gear (rather then the speed sensor) that both speed sensors would react the same way. In wondering if they used a revised part in later rear ends?
Dave
[Modified by TT_Vert, 11:40 PM 4/15/2004]
Melting Slicks
Joined: Aug 2003
Posts: 2,406
Likes: 0
From: Fly Over State
Senior Member
Cruise-In V Veteran
Re: Vehicle speed sensor help requested. Used (TT_Vert)
I'd like to know ??
I got my DTE 4:10 Diff (FEDEX Lost it) & the speed sensor got broke :confused:
I got my DTE 4:10 Diff (FEDEX Lost it) & the speed sensor got broke :confused:
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Re: Vehicle speed sensor help requested. Used (ALLKAR)
Dave, can the sensor be rotated within the casting opening where it is seated?
I've never had my sensor removed and can't tell from the pictures I have... but I wonder if it can be rotated - in an alignment mannor?
I've never had my sensor removed and can't tell from the pictures I have... but I wonder if it can be rotated - in an alignment mannor?
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (Mike Mercury)
if you rotate it then the plug doesnt exit in the direction it has to. doesnt anyone here know if they revised the speed sensor one year?
Dave
Dave
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (TT_Vert)
i really need some help here. I need to figure out if GM ever changed the speed sensors between 97 and 04. The rear in the car is obviously different (the recess machined into the housing for back cover o ring) and Im just trying to figure out whats going on here. id have to have done all this work just to take it back out again.
Dave
Dave
Collections Hold
Joined: Aug 2002
Posts: 2,899
Likes: 6
From: Fort Wayne Indiana
Re: Vehicle speed sensor help requested. Used (TT_Vert)
Your issue sounds like one of two things:
1. The differential is/was a blem and put back into service
2. Someone has mixed-matched a 2-series carrier into a 3-series case or vise-versa
Regards,
DTE
1. The differential is/was a blem and put back into service
2. Someone has mixed-matched a 2-series carrier into a 3-series case or vise-versa
Regards,
DTE
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Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (DynoTech Engineering)
ok so there is only 1 speed sensor in production for these cars? How can i ID the carrier? its a 4.10 gear (can it even fit into a 2 or 3 series carrier) and it still has the getrag tag on it. Is there anything I can do about this?
Thanks
dave
[Modified by TT_Vert, 6:07 PM 4/16/2004]
Thanks
dave
[Modified by TT_Vert, 6:07 PM 4/16/2004]
Collections Hold
Joined: Aug 2002
Posts: 2,899
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From: Fort Wayne Indiana
Re: Vehicle speed sensor help requested. Used (TT_Vert)
1. Yes
2. You must diassemble to verify carrier-half thickness. 2-series have an "A" embossed onto the top of the case and 3-series a "B". You must disassemble the unit to find out if someone has mis-matched components
3. Any ratio will "fit" into any type case
Regards,
DTE
2. You must diassemble to verify carrier-half thickness. 2-series have an "A" embossed onto the top of the case and 3-series a "B". You must disassemble the unit to find out if someone has mis-matched components
3. Any ratio will "fit" into any type case
Regards,
DTE
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (DynoTech Engineering)
is there anything i can do to fix this w/o getting a new carrier? Does the speed sensor need to sit in further in the carrier or something? if so, can i machine my carrier??
any idea why 1 sensor would read going about 5 mph (this one jumps around until about 35 then its steady and accurate)
and the other i need to go over 20 to get any reading (that one starts at 1mph and goes up)
Does the 4.10 needs the "B" series carrier?
Thank you
Dave
[Modified by TT_Vert, 6:38 PM 4/16/2004]
[Modified by TT_Vert, 10:41 PM 4/16/2004]
any idea why 1 sensor would read going about 5 mph (this one jumps around until about 35 then its steady and accurate)
and the other i need to go over 20 to get any reading (that one starts at 1mph and goes up)
Does the 4.10 needs the "B" series carrier?
Thank you
Dave
[Modified by TT_Vert, 6:38 PM 4/16/2004]
[Modified by TT_Vert, 10:41 PM 4/16/2004]
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (TT_Vert)
i did a little research and at 41mph the speed sensor from my rear registers 1 mph. The other registers 1 around 5-10 MPH. this is odd and really messing up my gas mileage info, range info and cruise control :(
dave
dave
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (TT_Vert)
Does the speed sensor need to be closer to the reluctor wheel on the gear? I looked at the sensor and i could machine its base a bit to get it to sit down in the diff another 1/8" or so. And if it needs to be shimmed out I could do that as well. The o ring will seal it just fine either way. What do you think?
Dave
Dave
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (TT_Vert)
upon further investigation I think i found the problem. Now can you tell me if its correctable. On my stock diff, the reluctor teeth are dead center in the hole for the speed sensor as shown here:
On my 4.10 diff from corvettes of houston, the reluctor wheel is all the way to the side towards center of the diff. Is there anything I can do to fix this and make my speedo work in the lower speed range??
Thank you
Dave
On my 4.10 diff from corvettes of houston, the reluctor wheel is all the way to the side towards center of the diff. Is there anything I can do to fix this and make my speedo work in the lower speed range??
Thank you
Dave
Team Owner
Joined: Apr 2001
Posts: 54,204
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From: S.W. Ohio. . . . . . NRA Life Member
Re: Vehicle speed sensor help requested. Used (TT_Vert)
If I remember, the VSS is a hall-effect sensor. If this is the case, it needs be as close to the reluctor wheel as possible withoput physically touching it.
As for the reluctor being in the wrong place... how could that of happened? Was it assembled wrong by whomever did the gear upgrade?
My only work-around suggestion would be to angle the pickup towards the area that the reluctor currently resides. If you have a piece of aluminum tubing the correct diameter; cut off a 1/4" length "ring", then sand/grind/file one of the ends to be slanting. Then position the sleeve to where the VSS will be skewed towards where the reluctor is when the VSS is seated on the slanted ring. Problem is this will also slightly lift the sensor away from the reluctor wheel. Might be worth a try.
My only other thought would be to pull that half-shaft, then remove the side plate and look to see why the reluctor is off center to the casing top hole. Maybe it can be moved (slid) a little). You might want to contact the company that installed the 4.10 ring/pinion and see if they have any ideas for an easy fix.
As for the reluctor being in the wrong place... how could that of happened? Was it assembled wrong by whomever did the gear upgrade?
My only work-around suggestion would be to angle the pickup towards the area that the reluctor currently resides. If you have a piece of aluminum tubing the correct diameter; cut off a 1/4" length "ring", then sand/grind/file one of the ends to be slanting. Then position the sleeve to where the VSS will be skewed towards where the reluctor is when the VSS is seated on the slanted ring. Problem is this will also slightly lift the sensor away from the reluctor wheel. Might be worth a try.
My only other thought would be to pull that half-shaft, then remove the side plate and look to see why the reluctor is off center to the casing top hole. Maybe it can be moved (slid) a little). You might want to contact the company that installed the 4.10 ring/pinion and see if they have any ideas for an easy fix.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (Mike Mercury)
you are correct, the VSS is a hall effect sensor. You cannot offset the VSS in the diff as the machined hole it slides into is the size of the sensor and there is zero play. im not exactly following what you are saying to do w/ the aluminum tubing either. I thought the reluctor wheel was machined as part of the gear? if it is adjustable and mobile I guess i could yank the diff back out and do this all over again :( I did email the vendor, we'll see what they say. obviously after over a year i really have no recourse. Unfortunately it came this way from the vendor too :(
Dave
[Modified by TT_Vert, 11:08 PM 4/18/2004]
Dave
[Modified by TT_Vert, 11:08 PM 4/18/2004]
Collections Hold
Joined: Aug 2002
Posts: 2,899
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From: Fort Wayne Indiana
Re: Vehicle speed sensor help requested. Used (TT_Vert)
As we thought before, they have mis-matched internal components by mixing 2 and 3-series components together... There is no "easy" fix for this and the differential MUST be disassembled so that the correctly matched parts can be installed internally. No amount of "fabrication" will correct the issue either. That's probably why someone was selling it... :(
Sorry for the bad news...
Best Regards,
DTE
Sorry for the bad news...
Best Regards,
DTE
Team Owner
Joined: Apr 2001
Posts: 54,204
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From: S.W. Ohio. . . . . . NRA Life Member
Re: Vehicle speed sensor help requested. Used (DynoTech Engineering)
Sorry for the bad news...
well; at least he now has concrete answers as to what's wrong and also what needs be done.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
Re: Vehicle speed sensor help requested. Used (Mike Mercury)
yeah thanks guys. You think a bigger company like this would check this stuff out prior to selling it. Is there any chance the carrier could be shimmed over to get the relucator wheel where it needs to be? I know id have to adjust pinion depth accordingly though. DTE, how much do you charge for a 4.10 rear? Would it be worthwhile to send you my diff to have this issue resolved? Do i need a new carrier or a new housing (is my carrier a 2 series)?
BTW, I appreciate you guys taking the time to help me out.. :cheers:
Thanks
Dave
[Modified by TT_Vert, 9:28 AM 4/19/2004]
BTW, I appreciate you guys taking the time to help me out.. :cheers:
Thanks
Dave
[Modified by TT_Vert, 9:28 AM 4/19/2004]
Collections Hold
Joined: Aug 2002
Posts: 2,899
Likes: 6
From: Fort Wayne Indiana
Re: Vehicle speed sensor help requested. Used (TT_Vert)
We can fix it for you if you wish. We would like to take a personal look at it to see what we're dealing with before making a quote on price for the repair, so if you would like to send it this way for inspection, call the office to make the neccessary arrangements and we'll see to it that you're on the road ASAP! :)
(260)407-5455
Best Regards,
Phil
(260)407-5455
Best Regards,
Phil