rrwebster

I have an 85 and 86 Corvette, both with 5.7 TPI engines, and both with an automatic. I just got the 85 and noticed that the 85 shifts out of 1st into second at 4000 rpm while my 86 shifts out at 5100 rpm.

The 85 has a shift kit the 86 doesn't. the 86 has a hypertech chip, the 85 doesn't.

I've done the self adjust on both.

what can I do to adjust the shifting of the 85 to 5,000 rpm or is this difference because of the hypertech chip. I've already ordered a hypertech for the 85... the two computers are different.

thanks in advance,

Robert

383vett

Shift points on a 700r4 are determined by the weights and springs in the governor, not the computer. Buy a B&M governor weight kit and change to lighter weights. This will delay the wot shift points.

rrwebster

Thank you... actually I found a new governor on this web site:

http://www.transmissioncenter.net/highperf700r4.htm

search on 700R4 Corvette governor on the page to find it. it was only $38 and is made for a WOT shift at 5200 RPM.

Robert

rrwebster

Does the Governor cover just pop off? (pry off) and can it be removed and replaced without dropping the exhaust? it looks like it but I hate to try getting it out and not be able to.

thanks in advance!

Robert

383vett

I could get the cap off on my car without taking the exhaust off, but I had left the spring clip off and had a different exhaust from stock. I used a large screwdriver and hammer to remove the cap and an old bar type torque wrench to tap the cap back on. I still have a scar or two on my forarms from the burns (kidding),

rrwebster

looking at the exploded view in my service manual I don't see a spring clip. does it hold the govenor in?

383vett

No, I think some of the caps had a spring clip on the outside which was a pita. Some of my trannies came from non c4 stock so maybe the camaros or passenger cars used the clips. If you don't have it, all the better. The governer just rotates and pulls out.

rrwebster

Kewl... thanks for the tips!

rrwebster

I got the new govenor installed... no problems... used to do the 1-2 shift at 4200 rpm now it shifts at 3900... 2-3 and 3-4 are shifting at 5200 though, what could be causing this????

bjankuski

Too much spring pressure and not enough weight. The springs have a greater effect at low road speed and the weights have more effect as the speed increases.

rrwebster

This is a special govenor that is supposed to make the shift points 5200 at WOT.

rrwebster

same topic... shift points same transmission... 700 r4 now i'm working on my 88 gta with a 5.0 tpi engine... put a b&m shift kit in it... it's shifting better but unless I leave it in 1st gear and let it shift out to 2nd, it's shifting at around 20 mph.... 2200 rpm whether I'm accelerating normally or at WOT. My cable adjustment is correct based on everything I've read... it's fully extended at WOT and the normal shift points are what I've read however no downshift to 2nd when below 20 mph and the low rpm shifting at WOT.

I'd love this tranny to shift like my vettes... would a servo and govenor from a vette do this? Is there something I'm missing in the TV cable adjustment now that it has a shift kit?

I've called B&M and all they say is check the pressures.