heat and slipping tranny? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-28-2000, 01:18 PM
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heat and slipping tranny?

I have a 1998 S10 Blazer with 10,600 miles on it. I have noticed recently that when it is hot out and I am stopped for any length of time, such as at a red light, when I accelerate the truck makes a loud almost revving sound and there is a definite power loss. As it gains speed, it quiets down and is fine, until the next light. Does this sound like the tranny is slipping to you? If not, any ideas?

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post #2 of (permalink) Old 06-28-2000, 01:44 PM
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Re: heat and slipping tranny?

Is it a manual or auto tranny?

post #3 of (permalink) Old 06-28-2000, 01:56 PM
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Re: heat and slipping tranny?

Sorry, it's the 4 speed auto.

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post #4 of (permalink) Old 06-28-2000, 02:19 PM
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Re: heat and slipping tranny?

I am experiencing the same condition with my '93 blazer. 4L60E tranny. It only happend on hot days (over 100) . It is a very loud whine. Not sure exactly what it is. Is your truck still under warranty?

93 S-10 Blazer 4X4.
post #5 of (permalink) Old 06-28-2000, 02:25 PM
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Re: heat and slipping tranny?

I believe its the fans clutch locked up.. I had this same sound.. Kinda like a roar and then it would go away after a while.. Only on startup tho.. Sound and power loss till the end of the block and it would go back to normal.. Once I switched to the electric fan I wave not heard this sound again..


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post #6 of (permalink) Old 06-28-2000, 02:27 PM
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Re: heat and slipping tranny?

My Blazer is still under warranty (3 yr. 36K), and I plan on having Chevy take a look, but I wanted to go in with some sort of idea of what is happening!! I am somewhat glad that I am not the ONLY one who is experiencing this though.

post #7 of (permalink) Old 06-28-2000, 03:43 PM
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Re: heat and slipping tranny?

That sounds like my problem, is the locked up fan clutch a defect? Or is that normal operation?

post #8 of (permalink) Old 06-28-2000, 04:01 PM
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Re: heat and slipping tranny?

the power loss is significant, right? The truck will almost not get out of its own way. For example, kinda like starting up a steep hill from a dead stop in second gear.

93 S-10 Blazer 4X4.
post #9 of (permalink) Old 06-28-2000, 04:06 PM
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Re: heat and slipping tranny?

Yeah, the power loss is quite significant. I have to press the pedal down over half way to get it giddy-upping!! If the fan clutch were the culprit, I could see how it will zap the power. It's actually quite frustrating that there isn't more up and went, especially with the 3.73 gearing in the rear end.

post #10 of (permalink) Old 06-28-2000, 04:29 PM
 
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Re: heat and slipping tranny?

That's a normal operation for a fan clutch. Considering how much air it's providing to your engine, it's a good thing!

If you were to install either electrical fans by themselves or perhaps just as an add-on, you may never have the problem under normal conditions. If you could just keep that motor cool enough for the viscous fluid in the fan clutch from gumming up and working you'll be OK!

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