Question about 1987 Chevrolet R30

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87 chevy r30 trans doesn't want to shift and slips

The truck runs great for a while, like 40 miles, then starts slipping and not wanting to shift into Drive. Fluid looks clean, this trans only has 36,000 miles on it original, it came from an air force base. Truck also does not start until the engine cools completely, but runs perfect, while running. (except the tranny of course)

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Change the coolant temperature sensor.
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Vitally

Posted on Jun 02, 2009

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Drops out of OD.


Fluid Change has nothing at all to do with a fix
Nothing at all & on a worn trans can cause slipping
In your case I assume a shop gave it a try
The hard shifts tell you the valve body needs cleaning
I would first look at all body data related to the trans,whatever
your truck has TCM Module whatever
I would check all bulletins at a repair shop in their data base
I would have a mechanic ride with you to look at the trans
with the scan tool on it & watch the speed sensor & any
external sensors you may have for correct data
No also check the brake switch
Does it go into Lock-up in most gears (brake sw )

Jul 27, 2013 | 1998 Chevrolet Suburban

1 Answer

My tranmission wont shift into over drive and now starting to slip a little at first if i give it the gas hard


there could be many reasons or combination of reasons for this, but proper level and clean fluid would be the first thing to do-you do not mention how many miles or how long or often the trans has been serviced, but that is a major factor in longevity for any trans (especially in a heavy Ford). The slipping is a major consideration--you should make every effort NOT to drive it is such a way so that it slips as this will overheat and greatly accelerate the demise of your trans. You should consider doing a trans service, replacing the fluid and filter-you should be able to even drain the torque converter by removing the flexplate inspection cover, rotating the crank bolt to expose the 10mm drain bolt in the torque converter-this may make a big difference in trans performance, but if you have high miles and the trans has never been serviced, this could cause more harm than good, as it could dislodge all kinds of gunk from years of driving, plugging very small orfices in the throttle body.. You could just nurse it until you find a good, used trans inexpensively, they are plentiful since virtually any v-8 Ford of that era can be used, usually with minor or no modifications. If you decide to do a trans service and it works, consider installing a trans cooler (at least 24,000GVW) as keeping a trans cool dramatically extends the life of any transmission.

Aug 05, 2011 | 1989 Lincoln Town Car

1 Answer

1996 chev k1500-- when the weather turned cold the transmission seems to slip at start up in the morning. After I get going it seems to shift and run fine. Maybe feels a little soft on the shift for...


it sounds like the trans filter needs changed. the fluid will be thicker when its cold and will not pass through the clogged filter as easy. As you drive it the fluid heats up and becomes thinner then is able to pass through easier.

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1 Answer

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change it youll b fine i drive a 99 camaro with 165000 miles on it and i change my tranny fluid every 30000 miles if not comfortable doin that try slick 50 first

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2 Answers

The car takes off in a high gear


One very likely cause is the transmission fluid is low.Start the car up and let it warm up completely.Change slowly through all the gears and finish in nuetral.Now check the trans fluid.If its low,you add more through the trans dipstick tube.Hope this helps you

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My 2000 Toyota 4runner V6 125k miles automatic transmission started slipping on cold starts especially in the morning. After starting up, putting in drive and pressing the gas pedal first gear doesn't...


Low transmission fluid is usually the only reason power engages late or slippage occurs. But changing the transmission fluid again would not hurt. The stuff really shouldn't deteriorate like engine oil. Be sure to not run the vehicle many miles until the problem is completely resolved < 100 miles. One easy check would be to make sure the transmission lines are well connected and maintain pressure as well as fluid level. The good thing is that Toyota has a reputation of very good transmissions.

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1 Answer

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Did you change the transmission filter and gasket as well as the transmission oil before running your truck.

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