Transmission troubles

[thomas g. warner]

Are you sure it was not your fan engaging? it makes a lot of noise when it
engages to cool down the engine.

>Driving on freeway today near Seattle,the engine began to race out of no
>where.After pulling over and checking fluids,determined it wasnt that
>simple(Is it ever?...)Anyway we turned back to Olympia,and made it fine.It
>shifts fine,without any slippage,but at higher RPM seems to slip or start
>racing....any ideas?Torque converter,pumps,or vacuum lines?..Just hoping its
>nothing major..any help will be appreciated....Thanks
>
>QUECON
>Derek
>76 Palm Beach
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach

 

[tim brown]

Derek,

I think Frank is right. Last summer I was on the freeway and heard a
loud roar, which I presumed was the transmission. Stopped and checked
fluid; level was fine. Like yours, my tranny was shifting OK so I
nervously continued on. Took it to Buskirk's, installed new fan clutch,
uninstalled $127.71 plus labor from my wallet, problem solved. You
mentioned slippage, that could indicate a different problem. But if,
hopefully, it was just the fan clutch the GMC gods let you off easy.

Best Regards

Tim Brown
78 Royale
Jackson, Mich

 

[robert shimanek]

Derek:

Are sure that you are not hearing your water pump fan go into high speed
making you believe that the engine is racing? The fan is temp regulated
and will speed up when it gets into it's temp range. My $.02

Bob
77PB

>Driving on freeway today near Seattle,the engine began to race out of no
>where.After pulling over and checking fluids,determined it wasnt that
>simple(Is it ever?...)Anyway we turned back to Olympia,and made it fine.It
>shifts fine,without any slippage,but at higher RPM seems to slip or start
>racing....any ideas?Torque converter,pumps,or vacuum lines?..Just hoping its
>nothing major..any help will be appreciated....Thanks

>
>QUECON
>Derek
>76 Palm Beach
>
>

 

[jim bounds1]

Derek,
>From reviewing the thread, it sounds like you have plenty of sound advice.

I would add that if the fan sound troubles you, do not purchace a heavy
duty (90%) fan clutch as a replacement. The OEM is a 75% rotation clutch
which seems to do a fine job without the annoying "wer" sound when it kicks
in.

If you need the part #'s, give me a call at work Friday (1-877-275-4462)

Good luck,

Jim Bounds www.gmccoop.com
- -----------------

>Driving on freeway today near Seattle,the engine began to race out of no
>where.After pulling over and checking fluids,determined it wasnt that
>simple(Is it ever?...)Anyway we turned back to Olympia,and made it fine.It
>shifts fine,without any slippage,but at higher RPM seems to slip or start
>racing....any ideas?Torque converter,pumps,or vacuum lines?..Just hoping its
>nothing major..any help will be appreciated....Thanks

>
>QUECON
>Derek
>76 Palm Beach
>
>