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92 K1500 - manual tran: gear oil OR dexron auto

trekuhl

By trekuhl
in Ask A GM Technician

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trekuhl Enthusiast

trekuhl

Posted
Posted

1992 K1500 4.3L w/ 3 speed (with extra low towing gear - so i guess 4 speed technically) i believe this is the heavy duty cast iron manual transmission...

 

ok, just picked up my truck from the shop right before closing they put a new clutch kit in and new tranny fluid. I noticed a "gurgling" noise from the tranny now, which pretty much goes away completely when i press in the clutch and when i get to higher RPMs. the techs and service man. were already gone for the evening and the tire boy was the only one left pretty much so he was of no help...

 

I had a bunch of gear oil in the truck for them to put in; 80-90 valvoline or somthing BUT for some reason they put in Dexron auto fluid according to the invoice.

 

I was under the impression these older manual tranny's needed gear oil while only some of the newer ones took the dexron auto fluid, and this gurgling noise was not an issue before...

 

any ideas or experiences with this situation?

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

What trans... exactly. Some do take dexron. Get the "M" option codes off the SPID label in the glovebox. One of 'em is the trans I believe. I can look 'em up and see which it is.

 

Even if it were the wrong fluid, I can't imagine it causing a gurgling noise.

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