No Over Drive!! Need help!!
Thread Starter
Pro
Joined: Oct 2004
Posts: 644
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From: Clarksville Tennessee
No Over Drive!! Need help!!
This weekend I installed a TCI shift kit in my 85 700r4. I currently have 25k mile on the rebuilt tranny. I took my time installing the kit so I was careful to not to lose those check *****. I made sure to refill the tranny fluid before going on the test drive. During the test drive the car shifted just as TCI instruction sheet said it would.
1st to 2nd ....15-20 mph
2nd to 3rd ....25-30 mph
3rd to 4th ....40-45 mph
Once I get over 45 mph the overdrive normally kicks in. Since I installed this kit my tranny won't shift into overdrive at all. There is a BIG improvement in how the car shift until it's time to shift into overdrive.
Has anyone run into this problem with this kit ? Is there something I overlooked? Any advice would be greatly welcome.
1st to 2nd ....15-20 mph
2nd to 3rd ....25-30 mph
3rd to 4th ....40-45 mph
Once I get over 45 mph the overdrive normally kicks in. Since I installed this kit my tranny won't shift into overdrive at all. There is a BIG improvement in how the car shift until it's time to shift into overdrive.
Has anyone run into this problem with this kit ? Is there something I overlooked? Any advice would be greatly welcome.
Race Director
Joined: Feb 2004
Posts: 12,518
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I have no experiece with the tci kit, so I do not know the full extent of the mods. There are 4 possible check ball arrangement possibilities from 82-93. The first thing that comes to mind is checkball arrangement because it is so easy to make a mistake here.
Some guys have, for example, an 88 car, but the trans could be from a remanufactured 85. The installer would then match the checkball diagram for an 88. Most shift kit problem occur from a similar situation. Confirm the year of the trans by reading the code on the side. Then doublecheck the check ball stuff. Sometimes the wrong gaskets are installed on the seperator plate also.
Some guys have, for example, an 88 car, but the trans could be from a remanufactured 85. The installer would then match the checkball diagram for an 88. Most shift kit problem occur from a similar situation. Confirm the year of the trans by reading the code on the side. Then doublecheck the check ball stuff. Sometimes the wrong gaskets are installed on the seperator plate also.
Thread Starter
Pro
Joined: Oct 2004
Posts: 644
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From: Clarksville Tennessee
Thanks for the info guys!! It's looks like I'll be dropping the pan again this weekend. I think I need to take a look at the gasket alignment on the separator plate. and double check the check ball. I'll post my findings when finished.
Rssshen Vette
Rssshen Vette
Race Director
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If you post the code on the trans, I can decode it for you. Also most kits come with 2 sets of gaskets(4 total) . 1 set is for later transmissions, other for early, non aux valve body transmissions. Also they are marked with a small c, for case side, and a small v, for valve body side. I assume you knew this, but thought it could not hurt to post it anyway. If I can help, let me know. 
Race Director
Joined: Jun 1999
Posts: 14,924
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From: Merritt Ils Fl
Pete K can correct me if I am off base but as I recall the TCC is an electrical signal generated by the ECM. A solenoid closing actually. If either the external or the internal plug are not connected the TCC will not lock. Something else to check.
Race Director
Joined: Sep 2000
Posts: 17,298
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From: The Top of Utah
Originally Posted by rssshen vette
During the test drive the car shifted just as TCI instruction sheet said it would.
1st to 2nd ....15-20 mph
2nd to 3rd ....25-30 mph
3rd to 4th ....40-45 mph
Once I get over 45 mph the overdrive normally kicks in. Since I installed this kit my tranny won't shift into overdrive at all.
1st to 2nd ....15-20 mph
2nd to 3rd ....25-30 mph
3rd to 4th ....40-45 mph
Once I get over 45 mph the overdrive normally kicks in. Since I installed this kit my tranny won't shift into overdrive at all.
RACE ON!!!
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Race Director
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Originally Posted by Muffin
Pete K can correct me if I am off base but as I recall the TCC is an electrical signal generated by the ECM. A solenoid closing actually. If either the external or the internal plug are not connected the TCC will not lock. Something else to check.
Race Director
Joined: Feb 2004
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Originally Posted by Redeasysport
How about it Pete is the overdrive TV controlled or ECM controlled on this year?Inquiring minds wanna know.
Race Director
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Originally Posted by CFI-EFI
Third gear is direct drive. Fourth gear is overdrive. If it shifts "3rd to 4th ....40-45 mph" your overdrive is working fine.
RACE ON!!!
RACE ON!!!
I was focused on the "no overdrive" part of the question. As cfi-efi points out, sounds like a lock up problem.
Race Director
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The solenoid is opened and closed electrically. The fluid flows, actuates a hydraulic valve, allows fluid to flow to the lock up plate. The plate mechanically contacts the rear of the converter housing.
Lock up is electrical, hydraulic and mechanical. A failure in any of these 3 systems will cause a no lock up condition.
Lock up is electrical, hydraulic and mechanical. A failure in any of these 3 systems will cause a no lock up condition.
Race Director
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Originally Posted by Redeasysport
Duh yeah even I was using overdrive for lock up and the question still stands doesn't lock up occur electrically?So his problem is the plug right?
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
Originally Posted by Pete K
Do I detect a little attitude here? If I said something to offend you, it was not intentional. If so, accept my apologies.
Race Director
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Originally Posted by Redeasysport
NO Pete you got it wrong.It was I was a doofus as I was thinking lockup(as the poster was I think) but using overdrive as the word. So it meant I am the idiot.Still friends?
But saying overdrive. No harm, no foul.
Le Mans Master
Joined: Dec 2004
Posts: 5,789
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From: Myrtle Beach SC
St. Jude Donor '05-'06
So what is it you want to know?If your going into fourth that is overdrive.
If your talking about torque convertor lock up that is electrical and has nothing to do with the shift kit.You may have boogered up something hydralically but you need to check the plug first.Sounds like your kit is fine.
If your talking about torque convertor lock up that is electrical and has nothing to do with the shift kit.You may have boogered up something hydralically but you need to check the plug first.Sounds like your kit is fine.
Last edited by Redeasysport; Mar 1, 2006 at 10:14 PM.
Thread Starter
Pro
Joined: Oct 2004
Posts: 644
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From: Clarksville Tennessee
This is great information. When it comes to the transmission I've done the simpler things such as changing the transmission screen, torque converter and seals. Doing the shift kit isn't a big job. It's just paying attention to details. The plug inside the tranny was reconnected. I think my problem is with the gasket, and check *****. I'll take a look at the code on the tranny tomorrow. You guys have been a great help 
I'll get back tomorrow on my findings
Rssshen Vette
I'll get back tomorrow on my findingsRssshen Vette