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  1. #1
    Join Date
    Jun 2016
    Location
    Shawbury, Shropshire
    Age
    42
    Posts
    64

    Engine and gearbox fitting

    Hi all,

    I’ve just fitted the engine and gearbox to the chassis (Chevy 350/T5). The engine is pretty level sideways and front to rear but the gearbox mounts aren’t even. The drivers side is about 3cm lower than the passenger side. Is this normal and how do I get round it. I doubt the engine/box combo will twist that much so is it a case of 3cm worth of washers? Or am I missing summat?

    Does the gearbox need to be level with the diff connection for the prop shaft or just fitted with the bracket against the chassis rail?

    Hope that all makes sense.

    Cheers. Andy.

  2. #2
    Join Date
    May 2014
    Location
    Birmingham
    Age
    42
    Posts
    722
    I know Tremec gearbox's do mount off center so that is possibly correct, however 3cm is a lot maybe create a spacer of sorts?

    I'm sure someone with a T5 will comment also.

    Its important to line up the gearbox to the differential to stop vibration from the prop-shaft.

    Alan.
    AK Gen II delivery date Oct '15
    IVA pass Dec '18.
    On the road Jan '19
    GM LQ4 364ci, LS9 cam, Omex 710.
    Tremec T56 Terminator.

  3. #3
    Join Date
    Oct 2008
    Location
    Horndean, Hants
    Age
    58
    Posts
    582
    I spoke to Jon about this when fitting my T56.
    The gearbox face and the diff face should be parallel to ensure the UJs on the prop are properly loaded. They will not be in line, there will be an offset.
    I dropped mine on the engine mounts and then jacked up the gearbox rear end to achieve parallel. Then with the gearbox rear rubber mount installed, measured up and made a cardboard template to pick up the chassis rails and mount points. Jon then made up the cross member to the template and it was fine.
    As I recall, the spacer blocks welded to each side to pick up the chassis rails were about 8mm difference to account for the rotation of the gearbox. 30mm does seem a bit much.
    Bob
    AK GenII arrived 1st April
    Let the cursing begin.........

  4. #4
    Join Date
    May 2014
    Location
    Birmingham
    Age
    42
    Posts
    722
    Sorry Bob is absolutely right they need to be level but will be offset.

    Alan.
    AK Gen II delivery date Oct '15
    IVA pass Dec '18.
    On the road Jan '19
    GM LQ4 364ci, LS9 cam, Omex 710.
    Tremec T56 Terminator.

  5. #5
    Join Date
    May 2012
    Location
    burton on trent
    Age
    52
    Posts
    257
    Have got tremec t5 in my ak gen 2 behind 3.9 rover.on mine I got alloy block machined on angle to level the mounting plate on gearbox then purchased compact t5 mount from the states that bolts direct to plate across the underneath of chassis rails
    Pete

  6. #6
    Join Date
    May 2012
    Location
    burton on trent
    Age
    52
    Posts
    257
    The t5 mount that you can get from roadcraft is to deep by about 20mm if I remember correctly

    Pete

  7. #7
    Join Date
    Jun 2016
    Location
    Shawbury, Shropshire
    Age
    42
    Posts
    64
    Thanks guys, loads of great advice as usual on here. I got my mount from real steel which is probably the same as the Roadcraft one. Spoke to Jon and he suggested bending the AK bracket up towards the chassis.
    Do you have a link or part number for the compact mount Pete in case the bracket won’t bend to the right shape.
    Andy

  8. #8
    Join Date
    May 2012
    Location
    burton on trent
    Age
    52
    Posts
    257
    Will have a look see if I can find part no for you

  9. #9
    Join Date
    May 2012
    Location
    burton on trent
    Age
    52
    Posts
    257
    Hi Andy part no MD-604-1101 T5 MOUNT
    FROM MODERNDRIVELINE
    moderndriveline.com
    Hope this helps

    Pete

  10. #10
    Join Date
    Jun 2016
    Location
    Shawbury, Shropshire
    Age
    42
    Posts
    64
    Thanks Pete, i’ll take a look at that.

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