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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> 4L60E 3-4 clutch pack clearance(red eagle & kolene steels)
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Topic Review (Newest First)
08-16-2012 04:16 PM
Problem solved

So I found a trans shop that would actually order a few parts for me from transtar in Denver. (several of the shops wouldn't help me out for some reason)

I got a new selective backing plate at the thickness I needed to put my 3-4 clearance right at the tight side of spec.

Thank you for all of your help!
08-13-2012 11:00 AM
Kawabuggy If you can't get the snap ring in because the stack is too high up in the drum, then STOP what you are doing.. Your clearances are not correct and this is not going to work if you put it back in the vehicle this way.

Do you have a set of calipers? If so, measure the thickness of all the steels, backing plates, & apply plates, and write this measurement on the face of each. You may have to use brake cleaner to get the protective coating (grease/ATF) off the steels in order for the marker to mark.

Once you have measured all the steels, and backing plates, or apply plates, if you have more than 1 of these, you can begin to stack using the thinnest apply plate (if you have more than one), and then use the thinnest steels (if you have multiple thicknesses), and the thinnest backing plate (again, if you have more than one) then stack it again. If you come up with too much clearance, go back and replace one of the components (steel, backing plate, apply plate) at a time until you get your clearance correct.

If you still can't get the correct clearance, you may need to leave out a friction (if you are trying to stuff 8 or 9 in the drum, leave one out) and then double up on steels in one position and check your clearance again.

The 4L60E has at least 3 different steel thicknesses .055-.060", .076", & .106". In addition to the different steel thicknesses, the frictions offered by Borg Warner come in at least 2 different thicknesses-regular 4L60E, and also the 4L65E (which are thinner). With this combination of steels & frictions you can stack any drum to the correct clearance using various friction counts (up to 9).

You also mention a selective plate that goes under the backing plate? I'm not familiar with a set up like that. Typically the arrangement is apply plate/friction/steel/friction/steel/friction/steel/friction/steel/friction/steel/friction/backing plate. No steel plate between the backing plate & last friction that is put in the drum. Does the kit you purchased specifically state to put a steel plate between the backing plate & the last friction? If it does not, remove the steel plate between the backing plate & the last friction and check your clearances again.
08-10-2012 10:04 PM
pricesgarages i take it u installed the release springs like mentioned in the above post air check them a few times see if your clearence increased next take the planetary gear that locks to the 3-4 abd drop ib and see if u can turn it freely i set them tight around .010 but i away make sure they turn freely with the planetary on any transmission
08-10-2012 08:47 AM
abbazabba Thank you for your feedback dogwater!

It has been sitting for a few days now so I will dig back into it and see.

Anyone else have and suggestions?? Clearance specs with aftermarket clutch and steels? Selective plate ordering?

Josh? Crosley?
08-10-2012 06:35 AM
dogwater I had the same problem,the strange thing was I quit working on it for a day or two and it went together just fine.You might try air checking it a few times to squeeze some of the atf out of the clutches,but dont air check the 3-4 piston cause youll blow out the seals without the snap ring on.I was told that it does not make a differance if the clutches were freashly soaked with atf but I think it does.
08-09-2012 03:43 PM
4L60E 3-4 clutch pack clearance(red eagle & kolene steels)


Working 4L60E 3-4 clutch pack for 98 chevy k1500 350. The clearance is so tight that I can't get the snap ring in which prevents me from even using a feeler gauge. Is this a normal situation with aftermarket parts?

I am rebuilding using Alto-USA High Performance clutches and Kolene steels.

The top steel under the snap ring is selective and has a "B" on it. Where can I find these selective steels?

Any suggestions on clearance with this pack going into a truck? I have read many many different numbers.

Thank ya

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