My transmission is slipping oil when you floor it
Before guessing at transmission problems, check the fluid level (carwarmed up, engine running in Park on level ground) and have the PCMscanned for trouble codes FIRST.
Secondly, put a line pressure gauge,(or visit alocal trans shop) on the pressure test port and go for a drive toverify proper line pressure. Base pressure at idle in P,N,OD should bearound 70psi and around 140psi in R. Max line pressure should be atleast 190psi at WOT in 1st or 2nd, 225psi is optimum. If base pressureis low, trans or pump is worn out. If max pressure is low, check EPCsolenoid. If reverse is slow to engage, and line pressure does not comeup to at least 130psi in reverse, replace the boost valve with aTransgo 0.490" boost valve (easy fix in pan).
Slow, slipping or no reverse: “lo-reverse” clutches are wornout, fluid leak in the reverse apply circuit, or broken sunshell. It ispossible to remedy a fluid problem by removing the checkball from itscage in the case in the rear of the trans may help (must removevalvebody), or adding a high-viscosity additive such as LucasTransmission additive or other seal restorer product. May also haveworn boost valve (can replace in the pan).
Soft shifting, gradual performance degradation: Poor linepressure rise due to leaking boost valve, clogged EPC filter screen,failing EPC solenoid, or worst case: leaky seals throughout. TransgoHD2-C kit fixes first two without removing trans. Seal restorer may fixlast problem, but probably R&R. Also try a transmission flush withBG brand products (Firestone stocks it).
1-2 or 2-3 shift is slow/soft above part throttle: Trans is on its way out. R&R.
Good luck and hope this helps. keep me posted, be glad to help you get your transmission running 100% again soon and thank you for using Fixya.
The best up grade you can do for your transmission is to replace the servos with a Corvette Servo, there go for around $45.00 and can be replaced without removing the transmission pan and also replacing the Boost Valve with a 0.490 or 0.500 Boost Valve. The other inprovment that will help your transmission would be adding a B&M Shift-plus Electronic Shift Improvement kit, part # 70380 Cost around $45.00 if not less. http://www.bmracing.com/SPECIALS/ShiftPlus-electronic-Shift-Improver-for-GM
Feb 26, 2010 |
1997 Chevrolet Blazer