sprag question
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TECH Fanatic
Joined: Jan 2018
Posts: 1,250
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From: Dade City, Fl.
sprag question I will soon be reassembling my 4l60e. I have a single cage input sprag ...should I replace it with a double cage sprag? Should I replace the input and roller clutch sprag as a precaution? Thanks
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Joined: Mar 2018
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At one time I had 5 gallon buckets of low reverse roller clutches. They all looked hardly used. Take that how you will.
Sellers, builders and the paranoid will tell you otherwise.
They will break if you neutral drop it.
I have yet to have a fwd sprag fail solely because it was single cage.
Sellers, builders and the paranoid will tell you otherwise.
They will break if you neutral drop it.
I have yet to have a fwd sprag fail solely because it was single cage.
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Joined: Mar 2018
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I don't bother with the sprag that uses brass end caps. I for sure wouldn't drill holes in the over run clutch hub.
All the brass end caps seem to have wear problems.
All the brass end caps seem to have wear problems.
Last edited by FourthGenCamaro; Apr 4, 2018 at 07:36 PM.
On The Tree
Joined: Aug 2013
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Would you use the one with the dual plastic cage listed as part number A74658D on wit trans site?
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Joined: Mar 2018
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I haven't used one of those yet. I have one that came out of a newer model core and it looks ok. Theres a builder on here I think that says he uses those with no problems.
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TECH Junkie
Joined: Dec 2012
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From: Iowa
A74658C is the WIT number I usually go with.
29236am is the borg warner number.
Never ever have a problem with it. Inspect both races. Polish the inner with 800 then 1200 sandpaper, rough up the outer with 120 grit
29236am is the borg warner number.
Never ever have a problem with it. Inspect both races. Polish the inner with 800 then 1200 sandpaper, rough up the outer with 120 grit
TECH Resident
Joined: May 2006
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I use the nylon/steel cage 29 element Borg Warner in 750+FWHP applications. They have 12.7% wider sprag elements. You must add the lube holes as shown, and use the 4L60E overrun hub that has no wear at the retainer contact area on the overrun hub. The inner race must be in perfect shape and very smooth (mirror finish). The regular 29 element Borg Warner sprag with the steel retainers work very well in applications under 750FWHP.
Last edited by PBA; Apr 11, 2018 at 11:39 AM.
