1999 Astro 4L60E 3-4 slipping ...

1999 Astro 4L60E 3-4 slipping ...

Postby gene_sc [OP] » April 16th 2011, 5:01pm

Hi, new user here...
I have a 1999 Astro 4L60E with 3-4 slipping, Seems to have had a slight slipping issue in Drive over the last year (in the past I topped off the fluid and it was good to go). Was going down the freeway the other nite and trans started to slip badly in D & 3 (1,2 and passing gear work). Added a quart of fluid (turns out is was overfull) and limped it home. Dropped the pan expecting to find a bunch of material in the pan, but was only a very small amount of metal, no chunks ect, slight burnt smell.

I read the 4L60E common troubles posted on this site. From that info, seems I burned up the 3-4 clutches.

Looking for confirmation of the 3-4 clutches... as I expected a bunch of clutch material in the pan, could overfilling cause any of these symptoms? Anything else I can look at? If this was a T350 or T400 and I found such a small amount of material in the pan I would change the filter and add a can of Seafoam.

thanks,
gene

1999 Astro cargo 297K miles

EDIT: I did try my AutoXray scanner and it seems that it doesn't scan trans codes, also checked fuses underhood(all good)
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gene_sc
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Extra Info: 2wd 297K miles

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Re: 1999 Astro 4L60E 3-4 slipping ...

Postby ihatemybike » April 17th 2011, 10:42pm

If you serviced you trans regularly you won't see much in the pan as it's cumulative wear on the 3-4 clutch pack. Main reason for the wear is the soft shifting they set these trans up with so it's hard to feel when the gear changes happen.

I had to have Green's transmission rebuilt because of this. If you are able to drop the trans yourself you can save a lot of money. I was able to find a small rebuilding shop near me that did the job, with serious upgrades for less than a grand.

http://www.shiftritetransmissions.com/4L60Ea.htm

If you haven't done it already add some Lucas Transmission Fix. It's a friction modifier that will buy you some time. It's made Grumpy's slipping trans work well enough for some off road climbing fun. Last year on the BABE Rally a group of guys in a full size van complained that there trans shifted from 2nd directly to 4th, had them add Lucas and their trans functioned normally again.
Aaron

2005 Astro (Gandalf) - AWD, 4.3L, 3.42, 130k+ miles
1997 Astro (Grumpy - $250 Rally Van) - AWD, 4.3L, 3.42, LSD, 2" lift, 31" tires, 335k+ orig engine, $30 eBay fuel pump
Prev Astros:99,97,00,94,87,86
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Re: 1999 Astro 4L60E 3-4 slipping ...

Postby Phantom » April 17th 2011, 10:52pm

ihatemybike wrote: I was able to find a small rebuilding shop near me that did the job, with serious upgrades for less than a grand.

http://www.shiftritetransmissions.com/4L60Ea.htm


Wow that is a great deal , what is the name of the place that does rebuilds with serious upgrades for less than a grand , is it the same place as the link you give?
Thanks

It seems from the webpage they may not do Front Wheel drive trans , they have price listed but no info at all on any like they do for the RWD , wonder if they no longer offer
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Re: 1999 Astro 4L60E 3-4 slipping ...

Postby ihatemybike » April 18th 2011, 12:07am

Yeah, Shift Rite is the place that did Green's trans. I had them do all the hot rod upgrades. Trans slams the shifts hard, wife doesn't like it. If I get into it I'll break the tires loose for the 1-2 and 2-3 shifts.

The owner of Shift Rite (Brett) is not that great at website programming. He says that while RWD are their bread and butter, they don't have a problem doing FWDs. Says his busiest time is during plowing season. I've been told he'll walk me through a rebuild for Grumpy if done during his off season. I'll be paying the normal rebuild price while doing this.
Aaron

2005 Astro (Gandalf) - AWD, 4.3L, 3.42, 130k+ miles
1997 Astro (Grumpy - $250 Rally Van) - AWD, 4.3L, 3.42, LSD, 2" lift, 31" tires, 335k+ orig engine, $30 eBay fuel pump
Prev Astros:99,97,00,94,87,86
ihatemybike
Firing on 6 Cylinders (L2)
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Years of Membership: ihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full yearsihatemybike has been a member for 12 full years
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Re: 1999 Astro 4L60E 3-4 slipping ...

Postby Phantom » April 18th 2011, 1:29am

That would still be worth it , knowledge and experience , in the future you can do it for free labor and maybe do some for others who need help :thumbup: :rockon:
Phantom
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Re: 1999 Astro 4L60E 3-4 slipping ...

Postby gene_sc [OP] » April 18th 2011, 2:36am

Thanks for the replies... did a filter and fluid change, still slips.... Pulled the trans this afternoon, Found a couple used trans for $375 one with 117K and one with 70K on a factory reman...

gene
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Posts: 2
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Location: Sedro Woolley, WA
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Alias (AKA): gene
Van Make/Model: Chevrolet Astro
Extra Info: 2wd 297K miles


 
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