thm350 ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wibilly · 07-11-2006, 04:32 PM

i just pulled the pan on mt torbo350 to change the filter and gasket. it seemd to shift real hard and work good, i was told when i got the truck it was recently rebuilt but there was more sludge and metal filings in there that i'm comfortable with, probably a teaspoon full of filings i picked up with a maginet. is this normal or should i be concerned. i took the pans off 3 that i have here and this was by far the worst but the only one i know worked good. i know very little about auto trannies but would like to learn to build them. do you think i should put this back in as is or build a new one now?

Sweet72 · 07-11-2006, 04:45 PM

Clean out that pan, new filter and gasket, fresh fluid and put it back together. If it ain't broke... The stuff you found is friction and steel material from the clutches. Normal wear and tear. I've rebuilt mine and didn't think it was all that difficult, just had to have the bushing driver set to do it right and you can borrow one from a friendly transmission guy if you know one.

wibilly · 07-11-2006, 05:06 PM

i would eventualy like to build a bullet proof one out of a bopc case and the broken cased 4x4 one that i have just in case i decide to put the 500 caddy engine in latter. i hope this will last behind a strong and fresh 400 sbc for now

07-11-2006, 04:32 PM	#1
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	thm350 ? i just pulled the pan on mt torbo350 to change the filter and gasket. it seemd to shift real hard and work good, i was told when i got the truck it was recently rebuilt but there was more sludge and metal filings in there that i'm comfortable with, probably a teaspoon full of filings i picked up with a maginet. is this normal or should i be concerned. i took the pans off 3 that i have here and this was by far the worst but the only one i know worked good. i know very little about auto trannies but would like to learn to build them. do you think i should put this back in as is or build a new one now? __________________ common sense isn't so common anymore

07-11-2006, 04:45 PM	#2
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: thm350 ? Clean out that pan, new filter and gasket, fresh fluid and put it back together. If it ain't broke... The stuff you found is friction and steel material from the clutches. Normal wear and tear. I've rebuilt mine and didn't think it was all that difficult, just had to have the bushing driver set to do it right and you can borrow one from a friendly transmission guy if you know one. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.

07-11-2006, 05:06 PM	#3
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: thm350 ? i would eventualy like to build a bullet proof one out of a bopc case and the broken cased 4x4 one that i have just in case i decide to put the 500 caddy engine in latter. i hope this will last behind a strong and fresh 400 sbc for now __________________ common sense isn't so common anymore

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