I don't think I'd go with synthetic unless you were going to flush the whole system. Synthetic and conventional have different properties and especially with old oil it won't be a good combo I don't think, I could be wrong, so if I am somebody correct me. Change the filter and fluid and put in regular conventional fluid, then take it easy on 4th when you shift into it.
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The Joke Master
- June 30th, 2005
- 8513
- Jasen
- Retiring the 80Z project and Moving on
- Grand Rapids
- Mechanical Designer
- Send PM
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well trans fluid is hydralic fluid it pretty much is sythetic to start thin oil with adatives , i cant think of any new transmission fluid that cant be mixed aslong as it has met industry standards..the bad thing with auto trans is you always get the same symptoms no matter what the problem you could have a dirty old filter or your clutch pack could be wearing out you really dont find out till you start loosing gears all together or like my last time come to a dead stop on the highway at 80mph
unless you like to tear apart auto trannys but by that time you might as well rebuild it..lolOriginally posted by Frank The TankTook the restrictor plate off to give the Red Dragon a little more juice. But it's not exactly street legal, so keep it on the down low.
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InActive Member
- December 1st, 2005
- 1208
- Jeremy
- 1978 Pontiac Firebird Formula
- Dorr, Michigan
- Fence Installer
- Send PM
You spelled that wrong, it's TH350Originally posted by MattODoom*cough*T56*cough*
1978 Pontiac Firebird Formula W66
350 Small Block Chevy Bored .030 Over (355)
GM Performance Parts Vortec Heads
Holley 650cfm Double Pumper
Edelbrock Performer-Plus Cam
Edelbrock Vortec Performer RPM
Hedman Hedders 1-5/8" Long Tubes
2-1/2" Exhaust With "H" Pipe & Hooker Aero Chamber Mufflers
TH350 With B&M Transpak Shift Kit & 2400rpm Stall B&M Tork Master Converter
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no a th400 is spelled gas guzzler but you could also rip out the pumps at the gas station and not hurt it... depends were your priorities are..lolOriginally posted by Frank The TankTook the restrictor plate off to give the Red Dragon a little more juice. But it's not exactly street legal, so keep it on the down low.
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