tranny fluid - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71chevylongbed · 11-01-2005, 12:56 AM

how often should the fluid be changed in a TH400?

ed455 · 11-01-2005, 09:39 AM

If I remember correctly, the factory said 25,000 miles under severe use. Most of us fall under the severe use category.

**kwmech** · 11-01-2005, 11:06 AM

Fluid is cheap, I do mine once a year.

71chevylongbed · 11-01-2005, 02:56 PM

how much life does it take off the fluid if the engine is over heated? since there is a cooler in the rad it will effect the fluid wont it? i broke a fan belt and ran it overheated for about 10-15 min.

cableguy0 · 11-01-2005, 05:47 PM

and overheating engine will heat the trans fluid as well.i would pull the dipstick and look at the fluid. if its birght cherry red dont worry about it. if its turning brownish change it. all manufacturers now reccomend a transmission flush every 30,000 miles. vehicles that have this done have transmissions that live a lot longer.

11-01-2005, 12:56 AM	#1
71chevylongbed Got Horsepower? Join Date: Sep 2003 Location: IDAHO Posts: 406	tranny fluid how often should the fluid be changed in a TH400? __________________ 2001 Dodge 2500 Cummins, 4 inch lift, 35" Toyo MT's on Ultra wheels, P-Pump Conversion, AFE intake, Fass, 5 inch exhaust, Pyro,Boost,and Fuel pressure guages, and a whole bunch of other stuff "The Money Pit" SOLD-71 Chevy C10 long bed- 2/4 drop-- 350,th400, Edelbrock performer RPM intake,Edelbrock 600 CFM carb,Crower 240 cam,port and polish,Dynomax headers,HEI ignition,dual 2.5 inch exhaust with Flowmaster 50 series mufflers

11-01-2005, 09:39 AM	#2
ed455 Captain Ed Join Date: Jul 2003 Location: Port Charlotte, FL Posts: 1,241	Re: tranny fluid If I remember correctly, the factory said 25,000 miles under severe use. Most of us fall under the severe use category. __________________ If you ain't bleedin', you ain't workin'! 1999 C3500 LS 7.4L

11-01-2005, 11:06 AM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,575	Re: tranny fluid Fluid is cheap, I do mine once a year.

11-01-2005, 02:56 PM	#4
71chevylongbed Got Horsepower? Join Date: Sep 2003 Location: IDAHO Posts: 406	Re: tranny fluid how much life does it take off the fluid if the engine is over heated? since there is a cooler in the rad it will effect the fluid wont it? i broke a fan belt and ran it overheated for about 10-15 min. __________________ 2001 Dodge 2500 Cummins, 4 inch lift, 35" Toyo MT's on Ultra wheels, P-Pump Conversion, AFE intake, Fass, 5 inch exhaust, Pyro,Boost,and Fuel pressure guages, and a whole bunch of other stuff "The Money Pit" SOLD-71 Chevy C10 long bed- 2/4 drop-- 350,th400, Edelbrock performer RPM intake,Edelbrock 600 CFM carb,Crower 240 cam,port and polish,Dynomax headers,HEI ignition,dual 2.5 inch exhaust with Flowmaster 50 series mufflers

11-01-2005, 05:47 PM	#5
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: tranny fluid and overheating engine will heat the trans fluid as well.i would pull the dipstick and look at the fluid. if its birght cherry red dont worry about it. if its turning brownish change it. all manufacturers now reccomend a transmission flush every 30,000 miles. vehicles that have this done have transmissions that live a lot longer. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.



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