New guy here, think I blew the trans in my delta 88 today - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-08-2013, 10:07 PM   #1
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Default New guy here, think I blew the trans in my delta 88 today

Hey guys I'm new here, from Northern IL.
My car is a 1978 Delta 88 Royale with a 5.7 and a TH350.


On to my problem.
I started my car this morning and after I pulled out of the driveway, I stupidly put my foot to the floor on a cold engine. After about 5 seconds of acceleration I lost all forward gears. D,*, and L now act as neutral. Reverse works, and luckily I was able to put it back in the garage.

After I lost the forward gears I pulled over and took out the trans fluid dipstick, smoke came out and there was not much fluid in there, it covered about 1/3 of the cross-hatch area.

So is it time for a rebuild? I bought the car in October and have no idea the last time the transmission was serviced, the car has 165k miles.
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Old 03-08-2013, 10:09 PM   #2
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I just realized this section is for newer cars, hopefully someone will have some knowledge anyway.
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Old 03-08-2013, 10:17 PM   #3
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The TH350 does require the correct amount of fluid or slightly over full for shifts to happen well when cold. Have you topped up the Dexron fluid & see if anything happens?
You may have spun the sun gear and that will require a rebuild with clutch packs etc.
Old school cars should be warmed up a bit before driving off and never hard until fully warm
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