M817 Low Range Question

[travistodd1]

I have searched to no avail and was hoping someone could give me some info. I have read I can not use my 818 in reverse low range without damaging the transfer case. It is the sprague type. I have in my searches also read the opposite and beem told it is fine. Can someone clarify if I can or not?

 

[98G]

It's fine.

The "no low reverse" is specific to 939series trucks, not 809series. I own both.

Shift into low, throw it in reverse and have at it. You're fine.

 

[travistodd1]

Thank you, I wanted to be safe and not sorry with it. Thats a lot of transfer case for one guy to wrestle.

 

[G744]

Sprag, with a soft 'a', not sprague.

Spell nazi at work.

DG

 

[Ajax MD]

Thank you, I wanted to be safe and not sorry with it. Thats a lot of transfer case for one guy to wrestle.

I've done it. Not the worst job I've ever done but great care should be exercised to avoid injury.

 

[travistodd1]

I've done it. Not the worst job I've ever done but great care should be exercised to avoid injury.

I think for now I will just do my best to avoid the entire situation...

 

[tobyS]

I did it with help and a jack. Had it apart and back together at least 5 times. Mine was a new TC in my 817 that they had never properly set the play on the bearings. I could lift the output shaft almost an 1/8 inch. I though it was trashed.

Nothing hurt, bearings, gears....it was new. I learned how the rear drive is geared differently than the front. For every 17 turns the rear makes, the front drive turns 16. The sprag is a one way clutch and relieves the difference.

It was a good thing I used aircraft form-a-gasket, because i split it four times before finding a missing retaining ring.. I set the bearing shims to a very light preload and that was a great TC.