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 4.3 motor swap
#875211
03/14/08 09:00 PM
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Joined: Mar 2008
Posts: 15
OP
Need a Spot
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Hi every one, 1'st post!
I am considering trading my '95 montero for a '96 Acura SLX and have a question regarding a 4.3 vortec swap. I searched, but am getting conflicting information regarding the 4l30e tranny. Can someone tell me if it has a 90 degree or 60 degree chevy bolt pattern? I have heard both, and my mechanic buddy SWEARS it will bolt up. I know there is much more to the swap than just this, but I have an '01 4.3l with 17 (yes, seventeen) original miles on it along with the ECU, harness,etc.
Thanks in advance,
C.J.
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Re: 4.3 motor swap
[Re: morgan70]
#875212
03/15/08 01:42 AM
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Joined: Dec 1999
Posts: 1,035
Body Damage is Cool
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Unless GM has changed the bolt pattern on the later-model 4.3's, it would have same pattern as a 90 deg Small Block Chevy V8 (i.e., incompatible with a 60 deg V6 tranny).
The 4L30E has the same bolt pattern as a 60 deg GM FWD V6 (i.e., starter on the driver's side if it were mounted in the vehicle fore-to-aft instead of side-to-side).
It does have a removable bell housing so theoretically you might find that a bell housing from a 90 deg V8 or V6 might bolt up. This would greatly simplify the 'shoehorning' in of a 4.3.
Just a thought, maybe Jerry L. or other swappers can confirm......ed
'90 Troop 3.4 LS
'89 Troop RS (Has Valve Issues, needs Counseling)
HI, I'm Ed and I'm a Trooper-holic!
Keep On Troopin'......
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Re: 4.3 motor swap
[Re: Ed Mc]
#875213
03/15/08 01:48 AM
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Joined: Mar 2008
Posts: 15
OP
Need a Spot
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Thanks Ed, that's pretty much what I was thinking. I told my mechanic he was nuts. It looks like the northstar series of engines and the L47 from an aurora would fit to the stock bellhousing, but a 90 degree won't unless the bellhousing is changed like you said.
Thanks again!
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Re: 4.3 motor swap
[Re: Ed Mc]
#875214
03/15/08 02:07 AM
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Joined: Sep 2003
Posts: 1,214
Body Damage is Cool
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Unless GM has changed the bolt pattern on the later-model 4.3's, it would have same pattern as a 90 deg Small Block Chevy V8 (i.e., incompatible with a 60 deg V6 tranny).
The 4L30E has the same bolt pattern as a 60 deg GM FWD V6 (i.e., starter on the driver's side if it were mounted in the vehicle fore-to-aft instead of side-to-side).
It does have a removable bell housing so theoretically you might find that a bell housing from a 90 deg V8 or V6 might bolt up. This would greatly simplify the 'shoehorning' in of a 4.3.
Just a thought, maybe Jerry L. or other swappers can confirm......ed THIS IS CORRECT ON THE 4L30 REMOVE ABLE BELL HOUSING , HOW EVER AS FAR AS I KNOW NO OTHER GM TRANNY HAS THE SAME BOLT ON TYPE OF BELL HOUSING , THE 4L30 FRT BELL HOUSING IS ACTUALLY PART OF THE FRT PUMP ASSY , IT ISNT JUST A BELL HOUSING IN THE TRUE SENSE , JERRY
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 Re: 4.3 motor swap
[Re: JLEMOND]
#875215
03/15/08 05:42 AM
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Joined: Dec 1999
Posts: 1,035
Body Damage is Cool
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Mad Props to Jerry, You Da Man !!!!! <img src="/forums/images/graemlins/cheers.gif" alt="" />
'90 Troop 3.4 LS
'89 Troop RS (Has Valve Issues, needs Counseling)
HI, I'm Ed and I'm a Trooper-holic!
Keep On Troopin'......
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Re: 4.3 motor swap
[Re: Ed Mc]
#875216
03/15/08 08:38 AM
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Joined: Mar 2008
Posts: 15
OP
Need a Spot
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Mad Props to Jerry, You Da Man !!!!! <img src="/forums/images/graemlins/cheers.gif" alt="" /> Absolutely! I had no idea that the bellhousing was part of the pump assy. I try to learn something new everyday or else I feel that my day has been wasted. Thanks Jerry!
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