700R4 - does not shift, burnts smell... - Third Generation F-Body Message Boards


Transmissions and Drivetrain Need help with your trans? Problems with your axle?

700R4 - does not shift, burnts smell...

Reply
 
Thread Tools Search this Thread
Old 07-26-2017, 10:35 AM   #1
Junior Member
Thread Starter
 
Join Date: Feb 2015
Location: Debrecen
Posts: 26
Car: Pontiac Firebird 1991
Engine: 3.1L V6
Transmission: 4Speed Automatic

700R4 - does not shift, burnts smell...

Hi Guys,

I have been trough a engine rebuild and when we got the engine back, we also had some time and replaced the old trans fluid with DEX III trans fluids and we gave the 700R4 new filter as it should be.

We took it for a short drive to "break in" the engine, and all went fine. However after like 10 miles, the transmissiopn just stopped shifting up. As the engine is full rebuild I don't want to risk and rev it up above 3K so we did not tested it any further. But before that it did shifted in OD normally.

The bad thing is we started to smell someting similiar to burnt oil. So we checked the trans oil level and the smell was pretty strong so we think it was coming from the transmission.

All cables were in place for the 700R4, TV cable is fastened and was noit adjusted, the Lock-up cable was at place, no mechanical changes were made in the transmision. Its a quite good one has only 65K miles in it, it was saved from a mint car.

Any Ideas what to check or what could have gone wrong? Is it saveable?

Much appreciated for your help!
Toolsin is offline   Reply With Quote
Old 07-27-2017, 05:12 AM   #2
Junior Member
Thread Starter
 
Join Date: Feb 2015
Location: Debrecen
Posts: 26
Car: Pontiac Firebird 1991
Engine: 3.1L V6
Transmission: 4Speed Automatic

Re: 700R4 - does not shift, burnts smell...

Okay, so good news, we found that the O2 sensors cable burned as it touched the exhaust pipe, so the smell seems to be coming from there.

From here maybe I can check other options too.
Toolsin is offline   Reply With Quote
Old 07-27-2017, 08:57 AM   #3
Member
iTrader: (6)
 
daferris's Avatar
 
Join Date: Aug 2008
Location: Lansing, Mi
Posts: 210
Car: One owner '88 IROC 50k
Engine: L98 with bolt ons.
Transmission: T56
Axle/Gears: 4:10

Re: 700R4 - does not shift, burnts smell...

Best suggestion is to get a 0-300 psi gauge and on the driver's side of the car is a 1/8" pipe plug above the manual shift lever about halfway to the top of the trans. Confirm that you have pressure and that it increases when you give it gas. That will tell you if the pump is ok and also that the TV cable is connected correctly. Also posable if a cheap trans filter is used that it's collapsing under load.
daferris is offline   Reply With Quote
Old 07-27-2017, 09:07 AM   #4
Senior Member
iTrader: (2)
 
Tootie Pang's Avatar
 
Join Date: Aug 2009
Location: Los Angeles
Posts: 922
Car: 1989 IROC Convertible
Engine: 305 TPI (F)
Transmission: 700R
Axle/Gears: 3.42

Re: 700R4 - does not shift, burnts smell...

Did you drop the pan and replace only two or three quarts or did you flush the trans by cutting into one of the coolant line and doing a pump-out/refill flush?
Tootie Pang is offline   Reply With Quote
Old 07-27-2017, 10:46 AM   #5
Member
 
Jbuchanan's Avatar
 
Join Date: Mar 2017
Location: Sweet home Alabama
Posts: 265
Car: 1987 GTA
Engine: 5.0
Transmission: Automatic

Re: 700R4 - does not shift, burnts smell...

When you reinstalled the engine did you make sure the convertor was seated properly? I have killed a pump before on a stinking front wheel drive Cadillac because I failed to notice the converter had slid ever so slightly forward when I split the trans case from the engine. I replaced the engine and the torque converter was forced back into place by the flexplate and me running the motor to trans bolts back in with air tools........busted pump and I had to drop everything from the bottom again and replace the pump........it was a bad day
Jbuchanan is online now   Reply With Quote
Old 08-13-2017, 03:52 AM   #6
Junior Member
 
Wickydooda's Avatar
 
Join Date: Oct 2016
Location: California
Posts: 50
Car: 1989 Pontiac Firebird Formula 350
Engine: 13:1 383 Stroker (750cfm carb)
Transmission: 700R4
Axle/Gears: 1999 Camaro SS, 3.23

Re: 700R4 - does not shift, burnts smell...

Just adding my two cents: Once upon a time I changed out my shifter cable and didn't have it adjusted properly so when I was in reverse, or really any other gear, what the shifter thought was fully in gear, the transmission did not, so basically I was in between gears, which caused a whole.mess of burned clutches and stuff inside the transmission. Symptoms including slowly losing gears - day 1 was fine until I lost 4th. Day two I lost 3rd. Day 5 I lost 2nd. Properly adjusted shifter cable is very crucial to the life of your transmission.
Wickydooda is offline   Reply With Quote
Old 08-13-2017, 04:32 AM   #7
Supreme Member
 
Join Date: Jul 1999
Location: Calimesa, California, U.S.
Posts: 3,272


Re: 700R4 - does not shift, burnts smell...

Did anyone notice he said the "TV cable was not adjusted". Therein lies the problem...
Pro Built Automatics is offline   Reply With Quote
Reply


Go Back   Third Generation F-Body Message Boards >

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertising
Featured Sponsors
Vendor Directory

1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 11:46 PM.


All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: