3500 swap question

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1988GTU
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Re: 3500 swap question

Postby 1988GTU » Wed Oct 16, 2013 3:43 am

Rettax3 wrote:
1988GTU wrote:for the later design engine mounts, it would be fatuous to not at least try and make that bracket. For the L bodies with the rear engine mount AND that bracket... I could understand deep sixing it.

I'm definitely not arguing against you here, just to clarify, but why do you think it would matter to the transmission brace if the engine had a rear mount or not? That brace's sole purpose is to support the right side of the transaxle to keep it from flexing from either torque side-loads generated by force applied through the CV joints/drive axle and radial (relative to the axle-shaft) loads caused by steering and suspension movements transmitting forces through the axle... I don't see where the older-style mounts need this brace any more or less than newer-style mounts... What is the reasoning behind this statement?

Reasoning is the complexity of the situation if welding was not easily feasible. I would be willing to risk more in not having it for the older style than the later style.


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Re: 3500 swap question

Postby 3X00-Modified » Wed Oct 16, 2013 8:47 am

Wouldn't you still have to fab something up since the rear mount uses those bosses too? I don't see the old style mount fitting if the trans bracket doesn't since they do use the same holes.



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Re: 3500 swap question

Postby Slinky » Wed Oct 16, 2013 12:19 pm

Found it..

http://www.milzymotorsports.com/3500-di ... smissions/

Differential Bracket - Since the bosses for the differential bracket on the back of the 3500 are in a different location compared to where they were on your 3100/3400, we provide this new differential bracket to attach your new 3500 engine to your current transmission. We offer them for both the 4t65e/4t60e transmissions as well as the 4t45e. If you don’t know what those are, don’t worry, just order the kit for your car, and we’ll take care of the rest.


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Rettax3
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Re: 3500 swap question

Postby Rettax3 » Wed Oct 16, 2013 1:53 pm

3X00-Modified wrote:Wouldn't you still have to fab something up since the rear mount uses those bosses too? I don't see the old style mount fitting if the trans bracket doesn't since they do use the same holes.

I can't ever remember if the bracket fits between the block and the rear mount, or if it is the other way around. Either way, the worst you would have to do is throw in a pair of thick washers to space the mount back away from the block, if it is even necessary to do that much.


1989 Super Charged 3800 Series II (First)Six-Speed Conversion GTU
1990 Turbo 3.4 Five-Speed T-Type
1990 4.0L 4-Cam 32-Valve V-8 Five-Speed Indy GTi (Rebuild Project)
1990 Stock(!) 3.1 MPFI Auto Indy
1995 3400 Top-End Auto OD Z-26

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Re: 3500 swap question

Postby 3X00-Modified » Wed Oct 16, 2013 2:59 pm

The boss moved completely on the block though it will not line up, and yes the rear mount shares at leat one of those boss holes as this bracket in question uses.
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1988GTU
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Re: 3500 swap question

Postby 1988GTU » Wed Oct 16, 2013 4:21 pm

The 3t40 pos interferes with the engine mount bracket a great deal. Its not as simple as the manuals or if you have the later style engine configuration. I've had to make that rear trans to engine mount a few times for a few slush boxers that stayed auto.


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Rettax3
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Re: 3500 swap question

Postby Rettax3 » Wed Oct 16, 2013 6:23 pm

3X00-Modified wrote:The boss moved completely on the block though it will not line up, and yes the rear mount shares at leat one of those boss holes as this bracket in question uses.
Image

Interesting support-bracket for the intermediate shaft... The five-speed Isuzu mated to the 2.4 Twin Cam in my '97 Turbo Z-24 has a beefy cast support that looks like that. Is it from a Quad-sourced 282?


1989 Super Charged 3800 Series II (First)Six-Speed Conversion GTU
1990 Turbo 3.4 Five-Speed T-Type
1990 4.0L 4-Cam 32-Valve V-8 Five-Speed Indy GTi (Rebuild Project)
1990 Stock(!) 3.1 MPFI Auto Indy
1995 3400 Top-End Auto OD Z-26

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1988GTU
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Re: 3500 swap question

Postby 1988GTU » Sat Dec 07, 2013 5:53 pm

Image

Figured since I had to pull the drivetrain I'd show the rear engine/trans bracket that I made for the auto to 3500 swap.


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