PDA

View Full Version : Pattern Check


clydefrog
October 25th, 2017, 00:09
Ford 8.8 with G2 4.56 gears, new bearings and Detroit Tru-trac.

I think I am going to run it, heel contact a bit much but backlash is already pretty tight at .012 avg. Spec is .011-.016.
https://s5.postimg.org/g4vqyt8t3/IMG_5964.jpg

https://s5.postimg.org/4sj5h0kon/IMG_5965.jpg


Coast side makes my want to add a shim on the pinion but I don't want to throw off my drive side. Thoughts?
https://s5.postimg.org/ke0h0z4cn/IMG_5966.jpg

RCP Phx
October 25th, 2017, 01:23
I wouldn't run it! Try tightening the backlash before doing anything else.

clydefrog
October 25th, 2017, 08:08
I wouldn't run it! Try tightening the backlash before doing anything else.
Its already tighter than spec. If I tighten it then it would be tighter than spec.

RCP Phx
October 25th, 2017, 09:22
Then you going to have to play with pinion depth!

clydefrog
October 25th, 2017, 10:17
I'm actually gonna take your advise on the backlash first. I will decrease it down to .007ish and re-run the pattern. Thanks for the tip.

RCP Phx
October 25th, 2017, 10:32
I believe the spec is .008-.015" but that change will be significant!

RWKHausSupply
October 25th, 2017, 11:10
If that is a G2 gear (5 cut) than it should have a .006 engraved in the side of the ring gear, meaning set BL to that. The spec you're referring to is for a OE gear (2 cut)....

You need to tighten BL, and increase depth, as per that pattern and your given current BL...

RCP Phx
October 25th, 2017, 13:20
Also try to get a more consistent pattern, make sure and apply pressure to the ring gear!

clydefrog
October 25th, 2017, 23:47
Ok, much better. I added .003 to the pinion depth (wish I went with .005) and decreased my backlash down to .007 which, from what everyone is telling me, a bit loose. Pinion seems a bit shallow. I did put significant pull or resistance on the ring gear when I spun the pinion but the consistency is a bit off.

Thanks for all the advise. This is my first 8.8 regear. I really wish the Dana products did shims on the outside like ford, makes adjusting backlash a breeze!

https://s5.postimg.org/58cstdpyv/IMG_5970.jpg

https://s5.postimg.org/dqm8xq47b/IMG_5971.jpg


https://s5.postimg.org/6amzbxo7r/IMG_5972.jpg

RCP Phx
October 26th, 2017, 08:04
That's looking a lot better! MY 8.25 is adjustable by a pre-load/backlash spanner nut, it doesn't get any easier than that.