LML Front Diff Mount Bolts

[LBZ]

Anyone know what the length is on a stock front diff mount bolt for a GMT900?

 

[LML6600DMAX]

You trying to make a diff drop kit?

If so I can get you the measurements on those bolts. I got a kit here I haven’t installed yet.


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[LBZ]

I already made some spacers. I guessed at 1” thick. A year ago I started this when I put the 2.5” levelling kit in and never got around to installing it as I never found out what length of bolt I needed.

 

[LML6600DMAX]

I already made some spacers. I guessed at 1” thick. A year ago I started this when I put the 2.5” levelling kit in and never got around to installing it as I never found out what length of bolt I needed.

The new bolts in this ccm off-road kit are 14mm X 130mm. Hope this helps.

Also the spacers are 3/4”.


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[LBZ]

Thanks. The grade 10.9 14mm bolts I found in the garage are 150mm long which makes the difference with the 1” spacer a little over a 1/2” longer than I need so hopefully I don’t run out of thread.

 

[snowman22]

Do either one of you know the pitch? I need to pull the diff spacers out of mine to install the DHD brace. I was just going to pull them and figure it out, but then this popped up today..

 

[LBZ]

It’s either 1.5 or 2.0mm. I can’t remember and don’t have my thread pitch gauge handy. I want to say 1.5mm though.

 

[LBZ]

Well I can tell you now 1” is too thick. The RH side diff mount arm hits the LCA mount bracket. Back to the bandsaw to shave off 1/4”. So 130mm bolt is definitely correct with a 3/4” spacer. As for thread pitch I’ll try to confirm that at work tomorrow unless someone has access to a gm parts manual as it lists this info in the parts description.

 

[LBZ]

Thread pitch is 1.5mm I believe.

3/4” is the most you can go on an lml for a spacer. Not sure about a GMT 800. Any more than that and it will hit the crossmember mount bracket. Rears are easy to install. Front left is a cock unless you have a shorter wrench. Deep socket won’t fit and I could barely get my long handle snap on in there enough to grab the nut.