Question about GMC Sierra

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Very low pressure from transmission 92 gmc

Will go in gear for a short time , then no movement in any gear. fluid at proper level. start after stop to get gas , worked fine before no sign of problem then.

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  • GMC Master
  • 3,679 Answers

Sounds as if the tranny needs an inspection as you've checked fluid level ,might just be a sensor but if high mileage i'd say may need an overhaul , take to a tranny specialist who will give a proper diagnosis

Posted on May 13, 2014

  • 1 more comment 
  • Gary
    Gary May 13, 2014

    it has a TV,no shift solenoid. what now to check

  • Gary
    Gary May 13, 2014

    it looks like the TV is adjusted ok, when I started it this morning it shifted in to all gears , then when run for a few minutes it only goes into OD,1,2,3 NO reveres.

  • steve May 14, 2014

    sounds as if needs an auto trannt expert to actually see what the box is doing so i'd take to a good repairer

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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short shadey
  • 421 Answers

SOURCE: chrysler voyager automatic transmission problem

Sounds like you have yourself a bad shift solenoid pack this is mounted on the front of the transmission under a thick rubber boot and has an 8 or 10mm bolt holding a plug into it, these usually fail hot as it is an electronically controlled solenoid and there are tiny little springs and magnets inside that can stick also while you are in there do yourself a favor and change the two speed sensors on the transmission they are about $22 each and can also cause the problem you are explaining. the shift solenoid pack is about $120 on ebay and some sellers actually sell them along with the input and output speed sensors you may try changing those first and see if it solves it but i have a feeling your solenoid pack is failing also when you change these parts it may take the computer a few trips to relearn shift points but you'll know it fixed it right off the bat.. please rate and good luck -jeff

Posted on Sep 01, 2008

  • 31 Answers

SOURCE: 1994 del Sol will go into gear and then fade out

I believe it has a screen and filter. You might have a trans problem period. Your synchronizers could be warped and the clutch cannot hold a grip. And yes, automatics have clutches. Im assuming you have automatic.

the flywheel, hub, bearing, and synchronizers have to be in perfect form to grip gears, if it's slipping out of gear which is what your fading out description means to me, than you have a trans problem or your not getting proper lubrication. Lot of the times, in a car like that, it is a common tale to tell.

hope you get it fixed.

www.car-parts.com is a good site to go for used parts for your car and others. cheap and effective. goodluck.

Posted on Feb 16, 2009

emissionwiz
  • 77201 Answers

SOURCE: 97 gmc pickup with automatic transmission trouble

1st thing to do is test the system for codes, the problem is most likely a failed or stuck shift solenoid indside the trans, have you ever serviced the trans, sometimes a fluid and filter cahnge will cure these kinds of issues.

Posted on Nov 02, 2008

SOURCE: 1991 Ford Ranger STX 3.0l V6 Automatic

NO. Too little could. Does it still drive and shift at all?

Posted on Sep 28, 2009

  • 523 Answers

SOURCE: overdrive will not engage

Check the OD solenoid on top of the tranny (drverside) apply 12V + to it and take for a test run if she works then you know the problem may be the OD relay, temp switch or its wiring. I had just simply rewired a new OD switch.

Please let me know if this help.

Thanks,
Tom

Posted on Jun 30, 2010

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How much trannyfluid goes in a 99 gmc sonoma


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Jan 22, 2011 | 1999 GMC Sonoma

1 Answer

1999 grand cherokee engine starts butwill not move in any of the gear selections. Scanned with autoenginuity scantool shows dtc codes p1767 and p1784


P1784 low reverse pressure switch sense circuit.
Start by checking fluid level and condition. then check electrical connections. if all ok, probably solenoid in the valve body assembly.

P1767 Transmission Relay Always On. Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Start with the simple and Check your fuses and transmission fluid level, if the level is good and the condition of the fluid is good. There may be an issue with your solenoid or your transmission pump. You can check your pump buy checking your transmission fluid level with the engine not running and take note where the level is. Then start the engine and check the fluid level again, if the level has gone down. The your pump is good, if it does not go down. Then your pump has gone bad and your going to have to rebuilt the transmission or replace the pump.

You better of replacing the whole transmission of the pump has gone bad, since the low transmission fluid pressure would have worn out most for your clutches throughout the transmission.

Thank you for using Fixya and hope is just a simple Solenoid that has gone bad or a wire harness that has shorted out.

Nov 24, 2010 | 1999 Jeep Grand Cherokee

1 Answer

My Transmission was operating fine and then out of no where it just fell out of gear and would not go into reverse or drive. When I start it in the morning I can drive it for about 5 minutes and then the...


No movement in any gear: pump failure, or total loss of fluid. R&R, or refill pan and find the leak. If out of fluid, avoid running the engine until the trans is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.
Soft shifting, gradual performance degradation: Poor line pressure rise due to leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Transgo HD2-C kit fixes first two without removing trans. Seal restorer may fix last problem, but probably R&R.
Put a line pressure gauge (or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.490" boost valve (easy fix in pan).
Thank you for using fixya and good luck. Transmission failure is common when you have the transmission flushed rather then having it serviced by dropping the transmission pan and letting the fluid drain on it's own.

Apr 27, 2010 | 1996 GMC Sierra

1 Answer

I have a 1997 chevy 1500. The Trans (4l60e) is bad i think


Before guessing at transmission problems, check the fluid level (car warmed up, engine running in Park on level ground) and have the PCM scanned for trouble codes FIRST.
Secondly, put a line pressure gauge (or visit a local trans shop) on the pressure test port and go for a drive to verify proper line pressure. Base pressure at idle in P,N,OD should be around 70psi and around 140psi in R. Max line pressure should be at least 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressure is low, trans or pump is worn out. If max pressure is low, check EPC solenoid. If reverse is slow to engage, and line pressure does not come up to at least 130psi in reverse, replace the boost valve with a Transgo 0.500" boost valve (easy fix in pan).
Slow, slipping or no reverse: “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the trans may help (must remove valvebody), or adding a high-viscosity additive such as Lucas Transmission additive or other seal restorer product. May also have worn boost valve (can replace in the pan).
Soft shifting, gradual performance degradation: Poor line pressure rise due to leaking boost valve, clogged EPC filter screen, failing EPC solenoid, or worst case: leaky seals throughout. Transgo HD2-C kit fixes first two without removing trans. Seal restorer may fix last problem, but probably R&R. Also try a transmission flush with BG brand products (Firestone stocks it).
No movement in any gear: pump failure, or total loss of fluid. R&R, or refill pan and find the leak. If out of fluid, avoid running the engine until the trans is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.
1-2 or 2-3 shift is slow/soft above part throttle: Trans is on its way out. R&R
Good luck and start with checking your transmission fluid level. Thank you for using Fixya

Mar 16, 2010 | 1997 Chevrolet Suburban

2 Answers

I put in a used transmission into my 2000 gmc sierra 1500 4x4 why wont it shift into any gear and the shift indicator doesnt work now?


Hi there,

I would firstly suspect a problem with the Park/Neutral Position Switch, as this switch is connected directly to your dash gear indicator.


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1st test: attempt to START the engine in each of the following gears: P, R, N, D, 3, 2, 1 (or L, C etc).

1) Engine should start in P & N ONLY
2) Engine should NOT start in other gears

- If engine does not start in any gear, then ensure switch is connected properly.
- If engine starts in both P & N ONLY, then switch is working OK.
- If engine starts in P, but not in N....then switch requires correct alignment on the transmission.



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Should this still not resolve the problem, then you will need to have your local dealership access your vehicle's on-board diagnostics/trouble codes - this will immediately identify where the the fault lies (as all transmission electronics are monitored by the OBDII system).

Cheers,


"If this information has helped you in any way, please rate this solution"

Jan 27, 2010 | 2000 GMC New Sierra 1500

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