Question about 1986 Chevrolet S-10 Blazer

1 Answer

1986 blazer s10 auto transmission slips when it changes into 3rd

Ran it for a short time with no t.v.cable could its have damaged anything
it shifts great until it get to 3rd or 4th gear. engine is a 2.8 lt. v6

Posted by on

  • wstevenmathi Jun 20, 2009

    yes the cable is now installed and adjusted correctly but still doesnt shift right. what part would it break....would it be to complicated to repair or would I need to pull the trans and have it rebuilt??



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 237 Answers

Yes, it can damage the transmission. The throttle valve cable controls a modulated pressure - according to throttle opening. A missing or improperly adjusted tv cable results in too low pressure. You didn't state clearly if cable has been installed now. Be sure to install and then make proper adjustment. It should be a self-adjusting cable but they most always need a bit of tweeking as the self-adjust is imo a poor design. Too little space here but you can probably google the adjustment proceedure. Hopefully it wasn't damaged and you'll be OK with proper adjustment. Good luck.

Posted on Jun 19, 2009

  • PokeyOkie
    PokeyOkie Jun 20, 2009

    it doesn't really "break" a component, but the low modulated pressure at the valve body affects things such as shift timing, quality & overlap. Most notably It will have inability to shift down at the proper speed/load, especially in od, thus placing undue stress on the 3-4 clutch pack. This clutch is particularly susceptible to damage from incorrect adjustment. If that clutch has been damaged, and it likely has, you will need to remove the trans for rebuild.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

When hot trany will not work in all gears have just replaced filter gasket

Hello and welcome to FixYa!

If you haven't replaced the transmission fluid recently then now is the time. If the fluid is burnt, the transmission tends to fail specially on hot temp. Please do check the transmission fluid first as a first course of action.

Hope this helps and thank you for using FixYa!

Apr 11, 2011 | 1990 Dodge Caravan

1 Answer

Had transmission rebuilt in my s10 blazer now it

Transmission does not shift automatically, only manually. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS.

3rd gear starts, can manually shift through all gears. When car has been turned off for a bit, then back on it will run normally.: VSS drop off w/ Hi-stall converter. The rpms are too high, but VSS is showing no movement. Happens after a tire burning take-off. Doesn't store a code, will not throw a CEL (I've heard that it will store a code if it happens 3 or more times). Cure: Reprogram PCM for VSS drop off -- PCMforLess knows about it.

Note that many problems that show up as transmission issues are actually PCM or electrical, and may be external to the transmission. Try a different PCM, and check for chafing where the cables come out of the PCM or the transmission on the passenger side.

Good luck and thank you for using Fixya.

Mar 13, 2010 | 1995 Chevrolet Blazer

1 Answer

1986 volvo 760 turbo shifts hard into 3rd gear. Has auto-trans. If I let up on gas then it shifts.

All automatic transmission models in 1985,1986 and onwards used either a ZF series transmission or an AW7x transmission. In either instance, shifting is accomplished by the cable at the throttle body, connected to a cam inside the transmission case. Since no brake bands and only clutch packs are utilized, it's important to keep the fluid changed according to the manufacturer's Specifications. First, have the oil serviced and screen changed. At the same time, remove the magnets and clean them of shavings. Then, adjust the cable so that it is very nearly slack on the throttle stop. This is accomplished by moving the cable adjusting jam nuts back and forth. Shortening the cable increases the shift map for shorter, harder shifts and vice versa; though it is important to ensure the crimp at the cable sheath is approximately 1mm away from the sheath end. Remember that this system is controlled by this cable and the internal governor inside the transmission case. Letting up on the gas allows the cable slack to allow the governor to increase the line pressure, allowing this car to shift to 3rd gear.

Early model ZF series are rather fragile, AW70 and AW71 series are more robust, and AW72 series transmissions are among the most stout in production at the time. Always ensure that the transmission fluid is normal in color, at the appropriate level and not full of contaminates. Do not make these adjustments until the transmission service has been completed, since there is a possibility of damage to the transmission valve body with an over adjusted cable.

To service, remove the transmission oil pan after draining the fluid. It could be hot, so ensure safety comes first to aviod burns. Remove the filter/screen. Remove the gasket and all traces of it on the sealing faces, ensuring that you do not scratch the facings on the case or the oil pan. Attached inside are several magnets, which can be removed for cleaning. They are there to catch shavings from the machining operations before they can damage the transmission. Install a new filter/screen, gasket and finally the oil pan. Install the bolts loosely and tighten only to the Specifications - overtightening will ruin the gasket and possibly damage the oil pan. Fill the transmission with the proper transmission fluid (Mercon/Dexron IIe per the transmission - see specs first) and check the fluid level, adding and topping off a little at time. Always check the fluid level on flat, level ground, passing through each gear range and waiting two minutes, cold or hot.Do not overfill, as this could damage the transmission or cause fluid to be ejected from the filler tube. Then perform the cable check, taking care to not overtighten it or else the cam will never fall against the stop. Test drive the vehicle at the end, making fine adjustments as needed.

Jan 28, 2010 | 1986 Volvo 760

3 Answers

Automatic car won't shift from 2nd to 3rd, it just revs up

no you have a failed transmission on your hands, it is slipping.

Aug 13, 2009 | 1993 Oldsmobile Cutlass Ciera

4 Answers

96 chevy blazer 3rd gear and overdrive slipping

i got a 1996 chev. blazer s-s10 4.3 engine 4x4.problem i got is i got 1st 2nd & overdrive & reverse but no 3rd gear what should i do

Jun 30, 2009 | 1996 Chevrolet Blazer

1 Answer

Changed engine,starter hitting flywheel

did you put the shims back in the starter?

Apr 22, 2009 | 1986 Chevrolet S-10 Blazer

3 Answers

Transmission wont shift

check the kickdown/throttle valve cable. It may be bound up and stuck in the maximum position giving you extremely late shifts.

There ISN"T any modulators or vac lines on any Chrysler automatics

Nov 08, 2008 | 1993 Jeep Grand Cherokee

1 Answer

Digital display cluster

Chevy is known for using a cheap grade of wiring harnesses that corrode over time and short out. my 93 s10 blazer had a bad wire in the transmission harness resulting in only 2nd and 3rd gear and wouldnt shift by itself, i dont know if im right but something to check into.

Aug 08, 2008 | 1993 Chevrolet S-10 Blazer

Not finding what you are looking for?
Cars & Trucks Logo

256 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

81400 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides