th700 wont shift higher than at 3500

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May 23, 2008 | 02:59 AM

Jeniik

Thread Starter

Junior Member

Joined: Apr 2008

Posts: 13

Likes: 0

From: Prague, Czech Republic, central Europe

Car: 1989 Trans Am GTA, T-tops

Engine: 350 TPI, hypertech, K&N, no muffler

Transmission: th700

Axle/Gears: posi rear, that's all I know

th700 wont shift higher than at 3500

Hi

My problem: I have had my transmission rebuilt and upgraded with bigger valves, it shifts firmly just enough, downshifts really fast but won't hold first or second gear higher than to 3500 rpm. On D or OD. The TV cable is adjusted properly.

Any thoughts?

Thanx.

May 23, 2008 | 03:08 AM

chupalupa

Junior Member

Joined: Feb 2008

Posts: 28

Likes: 0

Car: 1991 z28

Engine: L98 TPI

Transmission: Built 700R4

Axle/Gears: 3.23 posi

Re: th700 wont shift higher than at 3500

as i remember, when i had mine rebuilt, the governer in the 700 case i had rebuilt was from a v6 car, swapped it for the proper one and she shifts at 5k WOT every time.

May 24, 2008 | 02:29 AM

Jeniik

Thread Starter

Junior Member

Joined: Apr 2008

Posts: 13

Likes: 0

From: Prague, Czech Republic, central Europe

Car: 1989 Trans Am GTA, T-tops

Engine: 350 TPI, hypertech, K&N, no muffler

Transmission: th700

Axle/Gears: posi rear, that's all I know

Re: th700 wont shift higher than at 3500

One more thing... The odometerdoes not work correctly, counts only one third of the actual miles...

What is wrong in the tranny? Does anyone know?

Thanks for any help.