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

700r4 wont hold first gear HELP !

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Old Mar 12, 2014 | 06:41 PM
  #1  
richw40's Avatar
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From: homosassa fl
Car: Silverado 1986 TransAm
700r4 wont hold first gear HELP !

Hello to all,
recent rebuild done by pro trans guy. Problem I'm having is, with the shifter set in the "low, first gear" position, and hold it there, the trans will shift into 2nd gear. My linkage and shifter are ok. A mechanic told me that the factory set up the trans this way to help not burn up clutches.

Any truth to that? And is there a fix in the valve body that can keep this car in first gear till I want to shift ?

Thanks for any help...............
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Old Mar 12, 2014 | 08:09 PM
  #2  
paulo57509's Avatar
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From: Tracy, CA
Car: '87 IROC
Engine: LB9
Transmission: TH700R4
Re: 700r4 wont hold first gear HELP !

Here's a reply from Pro Built:

https://www.thirdgen.org/forums/post...68-post10.html

Was your transmission just rebuilt "stock" or were any upgrades installed (shift kit, upgraded clutches, etc.)?
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Old Mar 13, 2014 | 05:22 AM
  #3  
richw40's Avatar
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From: homosassa fl
Car: Silverado 1986 TransAm
Re: 700r4 wont hold first gear HELP !

it was a stock rebuild, and it is an early 700r4.................no shift kit or manual reverse valve body
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Old Mar 13, 2014 | 08:09 AM
  #4  
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From: Chasing Electrons
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Transmission: check
Re: 700r4 wont hold first gear HELP !

Shifting into 2nd on stock 700R4 when the shifter is held in 1st is normal. It was apparently done on purpose as an anti-abuse mechanism.

There are TransGo shift kits that will bypass this 'feature.'

RBob.
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Old Mar 19, 2014 | 09:56 PM
  #5  
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Re: 700r4 wont hold first gear HELP !

sorry for just jumping in this conversation but I have a 700r4 transmission I came home the other night and went to put my car in park and the shifter won't go past neutral reverse no Park disconnected it from the transmission and the linkage won't turn past neutral. can somebody please give me an idea of what's going on with my transmission all gears 1st through overdrive work phone reverse work fine all day as well
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