4+3 Transmission
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Joined: Jun 2009
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From: Fort Wayne IN
4+3 Transmission
Well, I am elbows deep in replacing gasket, filter, and fluid in my '88s overdrive unit. In the event that I have continued issues after reassembly, I plan to take it to a local shop for their opinion on my the O/D will not engage. I have read other posts that refer to a '4+3 Rebuild Kit', but have been unsuccessful in finding anything on line. Would appreciate any tips on finding parts of this unit in case I have to go that route!
Race Director
Joined: Jun 2009
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From: Southside of Western Norte Americano State of Confusion, ColoFornia
St. Jude '13
Ecklers catalog lists it as a "doug nash 4+3 rebuild kit" but S&K speed shop does the rebuilds on them and has a parts kit. ill try to find and post a link
Le Mans Master
Joined: May 2006
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From: Irvine Ca
Whoa!!! Hang on with the rebuild issue....there are about gazillion electrical inputs that need to be checked prior to you determining that.....
There is a trouble shooting guide that you need to follow to acurately determine why it is not engaging.............about step number 273 (sarcasm) states for you to rebuild.....
In my opinion......99.9% of the shops are going to suggest "rebuild" over replacing a $25 relay or a $32 pressure switch.....they have bills to pay and you are in a Vette....
There is a trouble shooting guide that you need to follow to acurately determine why it is not engaging.............about step number 273 (sarcasm) states for you to rebuild.....
In my opinion......99.9% of the shops are going to suggest "rebuild" over replacing a $25 relay or a $32 pressure switch.....they have bills to pay and you are in a Vette....
Slingshot
Joined: Dec 2001
Posts: 3,817
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From: Charlotte NC
Whoa!!! Hang on with the rebuild issue....there are about gazillion electrical inputs that need to be checked prior to you determining that.....In my opinion......99.9% of the shops are going to suggest "rebuild" over replacing a $25 relay or a $32 pressure switch.....they have bills to pay and you are in a Vette....
Le Mans Master
Joined: Aug 2000
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From: Australia
Do they have any experience in 4+3"s?
Most shops have never seen one and didn't know anything about them even when they were a current trans which is why they got a bad rap.
Talk to Brian at SK Speed 1st
http://www.skspeed.com/
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Joined: Jun 2009
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From: Fort Wayne IN
Whoa!!! Hang on with the rebuild issue....there are about gazillion electrical inputs that need to be checked prior to you determining that.....
There is a trouble shooting guide that you need to follow to acurately determine why it is not engaging.............about step number 273 (sarcasm) states for you to rebuild.....
In my opinion......99.9% of the shops are going to suggest "rebuild" over replacing a $25 relay or a $32 pressure switch.....they have bills to pay and you are in a Vette....
There is a trouble shooting guide that you need to follow to acurately determine why it is not engaging.............about step number 273 (sarcasm) states for you to rebuild.....
In my opinion......99.9% of the shops are going to suggest "rebuild" over replacing a $25 relay or a $32 pressure switch.....they have bills to pay and you are in a Vette....
. I was not yet going to run out to a shop with this unit. I just want to start thinking of the possibility of parts since this is a 22 yr old car. Spring is warming up and I am anxious to get this car off the blocks and back on the road.Do you have any links/information for such a 'troubleshooting guide'?
Race Director
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From: moraga ca
Thanks for the words of caution . I was not yet going to run out to a shop with this unit. I just want to start thinking of the possibility of parts since this is a 22 yr old car. Spring is warming up and I am anxious to get this car off the blocks and back on the road.
Do you have any links/information for such a 'troubleshooting guide'?
. I was not yet going to run out to a shop with this unit. I just want to start thinking of the possibility of parts since this is a 22 yr old car. Spring is warming up and I am anxious to get this car off the blocks and back on the road.Do you have any links/information for such a 'troubleshooting guide'?
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Thanks for the words of caution . I was not yet going to run out to a shop with this unit. I just want to start thinking of the possibility of parts since this is a 22 yr old car. Spring is warming up and I am anxious to get this car off the blocks and back on the road.
Do you have any links/information for such a 'troubleshooting guide'?
. I was not yet going to run out to a shop with this unit. I just want to start thinking of the possibility of parts since this is a 22 yr old car. Spring is warming up and I am anxious to get this car off the blocks and back on the road.Do you have any links/information for such a 'troubleshooting guide'?
Not sure what year this one is for....but Agent 86 has an '86 and he sent this one to me and I have an '84.....so go forth at your own peril...I'm not sure which version this manual goes with...but it is free
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Le Mans Master
Joined: Aug 2000
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From: Australia
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
And different years have different modes of operation
http://www.5speeds.com/43table.htm
http://www.5speeds.com/43table.htm
But the trouble shooting flow chart correctly diagnosed my issue way back when.....
Le Mans Master
Joined: May 2006
Posts: 9,226
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From: Irvine Ca
I'm not suggesting that someone not DIY...but claiming that it is a toy may not be 100% accurate.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Thread Starter
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Joined: Jun 2009
Posts: 74
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From: Fort Wayne IN
I have found an '88 manual on ebay and purchased this morning. While I might enjoy doing things I know I can handle with this car, sometimes you can make it worse and more $$ if you don't know what you are doing. It is sometimes safer to let your checkbook do the job!
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Le Mans Master
Joined: May 2006
Posts: 9,226
Likes: 9
From: Irvine Ca
Please confirm when you get the email with the .pdf
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Joined: Jun 2009
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From: Fort Wayne IN
I have put the car back together with no change in the 0/D status. I now have the car to a shop in nearby Decatur, IN. They have advised that the overdrive solenoid is definitely not doing anything. He is going to try to find one via skspeed.com. I wonder if there are any other known sources for this part?
Le Mans Master
Joined: May 2006
Posts: 9,226
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From: Irvine Ca
The O/D solenoid won't do anything and unfortunately you have to pull the pan to check it....You can't check it from the outside due to it having an input from the Pressure Switch which is located inside........
So you can power that solenoid all day long from the outside and it will do anything
So you can power that solenoid all day long from the outside and it will do anything