Question about 1987 Chevrolet V10

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Th 700r4 shift to early, betveen 3500-4000 rpm

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  • Chevrolet Master
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Adjust detent cable (longer) near throttle, no more than 1/8 click at a time. A little goes a long way. (raises line pressure)

Posted on Jan 02, 2014

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Posted on Jan 02, 2017

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SOURCE: 91 chevy k 1500 won't shift into reverse. i think

Could be a vacuum issue or the modulator..

The modulator tells it when to shift and is controlled by vacuum presure..
Check all vacuum lines that rum from the tranie for cracks, spits etc..

it could also be a sensor..

Hope this helps !!
Please rate me good ;o)

Posted on Jul 11, 2009

  • 1 Answer


take the pan off and check the reverse boost valve clip on the front drum and make sure the clip did not pop out of the groove. thats usually the problem or it can be your sunshell that either cracked or something.

Posted on Mar 15, 2010

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SOURCE: my 1988 k1500 700r4 will not shift out of 1st

mine wont shift at all stays in first or reverse

Posted on Dec 31, 2011

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700r4 transmission, my transmission is doing high rpm before shifting up from 1st gear, but with no slippage in any gear, rest of the upshifts are firm.BUT, on kickdown from 3 to 2.gear its going as i

I don't know if this will help,but i set my tranny up to shift hard like you are describing. Just by putting a clip on the kick down cable. The book talks about this, its cool if you like that sort of thing?

Jan 29, 2014 | Cars & Trucks

1 Answer

Transmission wont shift to second gear

The vacume hose on the vacume modulater on the trans mission is nt hooked to full engine vacume or the engine isn't making vacume.The governer will make the trans shift to second anyway at redline but it's preety hard on an old car to redline it just to find out/ It's possible that youv'e got the shift detent cable that hooks to the carb set too tight or it's stuck as if it's floored. with the cable disconnected it should shift out al the way real early as long as thirs vacume on the modulater. Gas mileage freaks that drive around slowly unhook th shift cale so the trans shifts into high gear real early. Not much for passing and acceleration but they get a little bit better gas mileage.

Sep 22, 2010 | 1979 Pontiac Firebird

1 Answer

I am wondering which transmissions will fit a 1997 GMC 2500. The truck currently has a 4l80E trans that is bad. Will a 700R4 fit?

Unless you want to do a lot of work i would find another 4l80E or rebuild yours. 700r4 is not electronic shift and you have no connection for the shift cable. And if you get a electronic 700r4 (4L60E) The plugs are completely different and you would need to change the whole engine harness and ecm.

Jun 06, 2010 | 1997 GMC Sierra K2500

2 Answers


sorry to tell you this, but those are the symptoms of a bad transmission. there is no solenoid or fuse that will take care of your problem, but to replace the transmission. hope you find a good cheap one..god bless

Feb 20, 2010 | 1998 Chevrolet Tahoe

1 Answer

What transmission is in a 1990 corvette?I think it is a 700r4?and if yes will any 700r4 fit ?

No there are different 700R4 transmission, well that not quite true. The 700R4 had many jobs to matted to Corvettes to SUVs, the internals are where the differences were in the 700R4 such as the servo's and boost valve which can be easily replaced. Best thing to do is to got to a Transmission shop that can build a transmissions for your Corvette or buy a replacement 700R4 for your year of Corvette. That is why the shift points and firmness are different in a Corvette then a Cadillac while they both have 700R4 in the 1990's. Be bad for a Corvette to shift like Grandma's Cadillac going to play dingo. Good luck and hope this helps.

Dec 15, 2009 | 1990 Chevrolet Corvette

2 Answers

91 chevy k 1500 won't shift into reverse. i think its a 700r4 transmission but im not sure. it also takes a high rpm to shift out of 1st. Thanks

check the throttle valve cable adjustment. maybe set too tight if shift out of 1st is delayed. best is to have it diagnosed and adjusted by an automatic transmission shop specialist.

Jul 11, 2009 | 1994 Chevrolet C1500

2 Answers

A buddy brought me his headache.Its a 1994 GMC jimmy with the 4.3 vortec 4X4 that had a 4L60E he swapped out the 4L60E for a 700R4 from an earlier chevy.the tranny modual plugs are totally different.How do...

The 700R4 is controlled by vacuum lines and throttle cable kick down linkage (TV) and need to be re calibrated to the engine as to being 4.3 or 5.0 to 5.7. Best thing to do is to get a transmission shop that knows how to custom install transmission like a speed shop. The TV cable adjustment on the 700R4 needs to be perfect. TV cable is used to set part throttle shift points, line pressure and if not set right will burn up the clutch plates due to low line pressure. Good luck and hope this helps. you going to need tools that most of us don't have, like to be able to measure and adjust the line pressure at different RPM. If you need more information, keep me posted and be glad to help.

Jun 03, 2009 | 1994 Chevrolet S-10

1 Answer

1998 chey pickup truck 700r4 tranny shifts fine when cold

try some transmedic .put a little in tranny .try to take out some fluid add it in dont over fill transmission .put about a half of bottle in it. it wiil loosen those stuck shift valves.

May 05, 2009 | 1998 Chevrolet C1500

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