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G3GM 1973 to 1977 A-bodys. Chevelles, Monte Carlos, El Caminos, Laguna, 442, Cutlass, Malibu, GTO, LeMans, Century, Regal, Grand Am, Grand Prix, Sprint, Gran Sport, Can Am, Hurst-olds, and other 73-77 A-bodies


Transmission help. Think my son's Laguna's tranny is toast

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G3GM :: G3 Tech :: Engine & Driveline

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Transmission help. Think my son's Laguna's tranny is toast Empty Transmission help. Think my son's Laguna's tranny is toast

Post by gpoetx Sat May 05, 2012 2:42 pm

So my sons Laguna started acting up last night and I think the tranny is toast, but I want anyones thoughts. Fluid seems full and not burnt. Put it in either drive or reverse and does not feel like its in gear. Hit the pedal and it takes a while and suddenly it starts to move. shifts really late and seems to move while pedal is down and seems like it bucks through the gears. \
Turbo 350 behind a mild built 350.
Bands? Pump? or the 2800 Stall Converter?
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Post by ant7377 Sat May 05, 2012 4:29 pm

Sounds wasted but could there be too much fluid in there ? It sounds like the pump is gone though.
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Post by 77mali Sat May 05, 2012 7:30 pm

Maybe check that all the linkage components are in correctly too. Although I'm not sure that would contribute to hesitation. Check your trans TV cable is in right also or not broken/loose. Hopefully its that simple. Check you vacuum modulator is working properly & that there are no big rips in the lines.
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Post by gpoetx Sat May 05, 2012 8:55 pm

Reverse totally went out now too. It's gone. Sucks cause it only needed to last two more weeks then it's getting parked for a while, while he drives his new car. Oh well, I'll be pushing it in the back and will get to it in 3 months after I finish the el camino.
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Post by pila Sat May 05, 2012 10:22 pm

Reverse is usually the first thing to act up when low on fluid, or the pump isn't picking up the oil. Even a filter with debris in it can slow the prime of the pump.
The TH350 is one of the easiest automatics to rebuild, if you are into doing it.

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Post by Sinister Tue May 08, 2012 4:22 am

Search local craigslist...I've bought a few for under $150.
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