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Post Info TOPIC: 4L80E question,


Canadian Poncho Superstar!

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4L80E question,


I'm interested in doing a heavy duty overdrive.

Will a 4L80E fit in the Tunnel of a 65-70 B Body?

It's a very big transmission, and the tunnel seems pretty small.



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67' Grande Parisienne. Ex Ottawa USSR Embassy car, 67- 68.
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63 Impala with 4L80E installed

I removed my 700R and replaced it with a 4L80E. Fits just fine. 
Had to modify my parking brake. I modified the 700R crossmember and 
used it but I will make something better.
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Canadian Poncho Superstar!

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Thanks for the info Carl. Being a X frame, he must have had his work cut out for him, but obviously that was a top shelf conversion.

I really think the tunnel is pretty small on the 65-70. While I know the cross member obviously must be modified, it's the floor pan clearance that I think would be a legit concern.

If you come across anybody with my body style having done this, let me know of the link. If it can be done without too much hacking and beating for clearance, then I'll try to find a good core. Something to keep me busy this winter. I'll need it as my Daughter just started University in residence, and we're empty!

 

Thanks,

Mark



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Can't wait for the updated thread with regards to the 4L 80E in the 65-70 B Body. I was looking at the GM performance site and the latest trans is the 4L 85-E and I was wondering if that trans would fit into my 68 GP. I think it could use an overdrive as well, so it is our good fortune that cdnpont has a winter project in mind!! LOL

Jake



-- Edited by Earl36 on Monday 25th of September 2017 02:34:42 PM

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Thanks Jake. I have sights on what appears to be a very good 1998 4L80E. If all goes well, I'll have it in my shed this coming weekend.



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NOS


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for many years ACC did not offer a 4spd carpet  for the 65-70 Chevy 'B' bodies. We simply sold a 'automatic with no problems. They now offer a 4spd. application. Visually the 4 spd has a slight hump on the left side of the tunnel. Other wise they look the same

Dale @ NOS



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cdnpont wrote:

Thanks Jake. I have sights on what appears to be a very good 1998 4L80E. If all goes well, I'll have it in my shed this coming weekend.


 my 2 cents....check out the installs on "you tube" 1st....i think you have to buy a convertor for the electronics....no speedo hookup

a 200r is the way to go now....there are upgrades available....its lighter...smaller....same size as a 350 th.....Bob



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I installed a 4L80E in a street rod (49 Meteor coupe) behind a stout BBC. Although I bought it brand new a number of years ago, it has never been 'powered up' so to speak. The clearance problem wasn't an issue in my case because I built the floor around the transmission, which as indicated above in Carl's post is substantially bigger than a TH350/400.

In my case I elected to go for a different convertor and after much research went with one from Pro Torque....TCI got the nod for the electronics. The speedo hookup is easy and there is a kit now available for a few bucks that eliminates the requirement for electronics but the down side is a manual shifting automatic transmission.

I have a friend that has recently installed a new 4L85E with a GM convertor and electronics that cost him over $7K Canadian dollars. That's a lot of moola but the 4L80/85E's are tough transmissions and are supposed to take abuse without breaking a sweat...

None the less, the post above from beaucarlo is worth investigating especially when size is a consideration.

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1949 Pro Street Meteor Coupe, 468 BBC, 4L80E, Narrowed 9" 3.50 posi

1955 Chevy Gasser BBC M22 410's
1966 Biscayne post, 427 L72, M21, 4.11's 16600 original miles

1966 Hemi Satellite 4 gear 59K original miles
1968 Z28 302MO, M21, 3.73's, cowl plenum induction



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Reviving this post. Just wondering if you have conducted any more research on this trans topic?

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Actually in the process of looking into it right now Jake. And it looks like a gear vendors overdrive is in the works. (retirement gift to myself!)

Comparing the two, the GVO comes in a little cheaper. A mod to the cross-member, a relief cut to a floor brace, new driveshaft and it's in. The 80e core I have needs a total rebuild (not cheap), a new (expensive) converter, a electronic controller (expensive), a throttle position sensor and a speedometer converter along with a cross-member mod and likely some tunnel massaging along with a new driveshaft as well. If you go on line, you'd be shocked how much a built 650ft/lb 4L80E package costs. It's around $7000 US.

While the 80e would be an elegant solution, with the bonus being able to control everything about the shift, there is too much unknown about the fitment for me. Plus I already have a great TH400 that wouldn't even have to be removed for the GV install as well already having a converter that is working great. I'm familiar with the 400 now, so any future work on it can be DIY.

Most all I read about the GVO is pretty good. 



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Let us know the result ? Curious about the Gear Venders as well.

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I have been reading on this as well. Appears the GVO can handle a lot of abuse and would be interesting to see a completed conversion. I see a "used" but warranted unit on Ebay right now for a reduced price.



-- Edited by 68 Grande on Friday 12th of October 2018 08:28:22 AM

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If you go ahead with this Mark please start a new thread on it. Congratulations on retirement!

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beaucarlo wrote:
cdnpont wrote:

Thanks Jake. I have sights on what appears to be a very good 1998 4L80E. If all goes well, I'll have it in my shed this coming weekend.


 my 2 cents....check out the installs on "you tube" 1st....i think you have to buy a convertor for the electronics....no speedo hookup

a 200r is the way to go now....there are upgrades available....its lighter...smaller....same size as a 350 th.....Bob


         x 2 



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Canadian Poncho wrote:

If you go ahead with this Mark please start a new thread on it. Congratulations on retirement!


Exactly!  Just think of all the new threads and projects we are going to benefit from now that Mark has retired.  (or will retire)  biggrin 



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Canadian Poncho Superstar!

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68 Grande wrote:
Canadian Poncho wrote:

If you go ahead with this Mark please start a new thread on it. Congratulations on retirement!


Exactly!  Just think of all the new threads and projects we are going to benefit from now that Mark has retired.  (or will retire)  biggrin 


 Ahh...well, I might have to rein in the spending a little. Is that what retired people do?



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