2000 GMC Safari Squeaking noise near transmission

STETSONMAN

MEMBER
2000 GMC SAFARI
6 CYL
AWD
AUTOMATIC
85,000 MILES

There is a squeaking noise that seems to be coming from inside the transmission. After having the van on the hoist and rotating the driveshaft by hand (van is in neutral) We have isolated the noise to be coming from inside the transmission. Any ideas about what this could possibly be would be appreciated. Fluid levels are good, and the van still shifts smoothly

4 Replies

DRDUFF

MEMBER
4 POSTS

Ihave a 1999 Safari SLE with the same problem my service engine icon is on & sporadically the Service AWD icon comes on shifts OK but sounds like the old school bus just before the driver would shift type of whine

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Wednesday, September 21st, 2011 AT 6:12 AM

MERLIN2021

MECHANIC
17,250 POSTS

For the sqeak check trans mount and tailshaft bushing/seal. For the whine read the codes and post results

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Wednesday, September 21st, 2011 AT 8:37 AM

DRDUFF

MEMBER
4 POSTS

This is on the 1999 Safari Had it checked out for free at the local Aamco they said the trans noise was more than likely a failing pump on the transmission the scan results were a code P0420A three way "cat" low efficiency B "1" it was also noted that the fuel guage shakes & "the under car checks" Transfer case shift linkage remarks "leaks fluid from half case"

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Saturday, September 24th, 2011 AT 3:04 PM

MERLIN2021

MECHANIC
17,250 POSTS

If it's the pump, and it also has fluid leaks, it may be time for a rebuild, the P0420 is a converter efficiency code. O2 sensors are detecting a problem. Catalytic conveter may need replacing as well. You need to figure out if the van is worth the cost to repair it.

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Saturday, September 24th, 2011 AT 6:48 PM