Having problems with your 2000 Chevrolet Silverado ?

2000 Silverado 4x4 transmision problems 1. Will not go into reverse. 2. High pitched whine when put in gear. 3. When starting from stop, does not shift out of first gear until speed reaches 25 mph and rpm is up at over 2000rpm. 4. Did not get out of second gear, got up to 50 mph at 2000rpm.

Posted / edited by AnonymousUser on : 16-10-2017

Answers :

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.\012
\012Secondly, 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)\012
\012Possible causes to your transmission issue:\012
\0121. 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).\012
\0122.1st and 3rd only, no 2,4 or R; sunshell is fractured or splines are sheared off. R&R. Try not to run or drive the car or further damage could result.\012
\012The transmission will default to max line pressure causing the whine you describe.\012
\012Thank you for using fixya and good luck.
Repair Help & Product Troubleshooting for 2000 Chevrolet Silverado

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