What do I need to do to use 4l80??
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What do I need to do to use 4l80?? I had mounts put on my custom chassis for a 4l60e. I have found some 4l80s around me that i could get for a decent price. There are a few threads discussing the size differences between the two but want to ask for my application. My question is can I use the mount I have on my chassis for a 4l80?? If so how much farther back would I have to move it??
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From: Turnin' Wrenches Infractions: 005
Maybe that's dependent on what tailshaft you run on each. I just made a custom crossmember and it was at least (minimum of 4 FOUR) inches further back then the original 4l60e mounting point.
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From: Turnin' Wrenches Infractions: 005
OP, here is a picture of mine, and my beginning mock up of a new crossmember. This is a 4l80e with a 60e stock mount on it. Notice the 3 holes on the left, 3 holes on the right (only one is visible on the passenger side), the stock crossmember went directly between those two sets of holes. That is clearly more then two inches to the rear.
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From: Upstate NY
If the distance difference depending on year of 4l80e is 1 7/8", do you know what years I would be looking for? If you look closely to mine, I can unbolt my mount and flip it around to achieve that without having to cut and weld in new spot. Jegs says the difference is 7".
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From: Turnin' Wrenches Infractions: 005
We either aren't communicating or you're confused. I ran a truck tailshaft for years, up until 2 months ago when i swapped from ls1/60e to 5.3/80e and the stock mount AND crossmember worked in the stock location with the 60e truck tail. No modification needed. I also referenced the above picture and believed i could slightly modify the stock crossmember and make it work with the 80e which was clearly not the case. It wouldnt even bolt to the car due to hitting the pan by several inches. The only difference in 60s is from 4wd to 2wd, and location there is the same but height needs to be taller for the 2wd, Ive done that swap as well.
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From: Turnin' Wrenches Infractions: 005
If the distance difference depending on year of 4l80e is 1 7/8", do you know what years I would be looking for? If you look closely to mine, I can unbolt my mount and flip it around to achieve that without having to cut and weld in new spot. Jegs says the difference is 7".
Also, that pic above is a 4 bolt tail LT1 style 4l60e/700r4, thats why its not entirely correct for LS swaps. The 6 bolt LS tail has the mount further forward.
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From: Turnin' Wrenches Infractions: 005
Here is an LS style truck tail. Notice the difference between its mounting point and the one in the pic above????
http://www.ebay.com/itm/4L60E-TRANSM...RZjI3S&vxp=mtr
http://www.ebay.com/itm/4L60E-TRANSM...RZjI3S&vxp=mtr
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We either aren't communicating or you're confused. I ran a truck tailshaft for years, up until 2 months ago when i swapped from ls1/60e to 5.3/80e and the stock mount AND crossmember worked in the stock location with the 60e truck tail. No modification needed. I also referenced the above picture and believed i could slightly modify the stock crossmember and make it work with the 80e which was clearly not the case. It wouldnt even bolt to the car due to hitting the pan by several inches. The only difference in 60s is from 4wd to 2wd, and location there is the same but height needs to be taller for the 2wd, Ive done that swap as well.
Here is an LS style truck tail. Notice the difference between its mounting point and the one in the pic above????
http://www.ebay.com/itm/4L60E-TRANSM...RZjI3S&vxp=mtr
http://www.ebay.com/itm/4L60E-TRANSM...RZjI3S&vxp=mtr
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From: Turnin' Wrenches Infractions: 005
Basically what i know is, there are about 3 or 4 output shafts of the th400/4l80e, and several different tail sections and slip yokes. On the LS 60e tails (truck and car) the mount is in the front towards the pan (as pictured in the ebay link), and on the LT/SBC style 60e/700r4 (4 bolt tail) the mount is midway, as pictured above in this thread. So the difference between 4 bolt tails and 4l80e may be 2 inches, but the difference between 6 bolt LS tails is 4 to 5, bc the mount is closer to the pan.
On an LT1/4l60e transplant that got an LS1/LS 4l60e I used his original crossmember and just added a plate to the top that moved the hole back about 2 or 3 inches. Just the difference between an older 60e and newer.
On an LT1/4l60e transplant that got an LS1/LS 4l60e I used his original crossmember and just added a plate to the top that moved the hole back about 2 or 3 inches. Just the difference between an older 60e and newer.
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There are 3 different length output shafts for the 80e. 4x4, standard, and heavy duty. If its not a 4x4, its a 99% chance you have a standard length. The longer heavy duty one was used a lot in industrial applications. They weren't ever used behind an LS based engine from what I remember. Mostly diesel applications, maybe a few big blocks.
The way the output shaft is splined is the biggest variance, but the actual tailshaft housing and mount were all the same for them.
The way the output shaft is splined is the biggest variance, but the actual tailshaft housing and mount were all the same for them.
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From: Upstate NY