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E body transmission centerline #3137010
04/10/23 06:49 PM
04/10/23 06:49 PM
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clarks summit pa
73cuda340 Offline OP
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Does anybody know the correct centerline measurement for an e body 4 speed? Maybe from the center of the tailshaft to the floor pan? My engine is sitting low in the back and I'm trying to determine if the engine is too high or the transmission is too low. Both engine and transmission mounts are brand new. Stock transmission crossmember and stock. al debevec hemi k member


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: E body transmission centerline [Re: 73cuda340] #3139975
04/22/23 12:29 PM
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The carburetor pad on the intake is supposed to be level front to back. Put a level on it and it will tell you where you stand.

Re: E body transmission centerline [Re: mgoblue9798] #3139977
04/22/23 12:51 PM
04/22/23 12:51 PM
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Man this poor guy can’t get any help.

You can’t use a level on the intake unless your are POSITIVE the car is at its normal ride height.

All you guys with E Bodies - all he needs is a few measurements.

Centerline of output shaft to floor and to one’s rocker flange.

Crankshaft centerline from top of front longitudinals and to side of one longitudinal.

And to make sure his engine is true horizontal when viewed from the front of the car.

Re: E body transmission centerline [Re: A727Tflite] #3140005
04/22/23 03:31 PM
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If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Re: E body transmission centerline [Re: RTSE4ME] #3140076
04/22/23 09:22 PM
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Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.

Re: E body transmission centerline [Re: NITROUSN] #3140297
04/24/23 08:20 AM
04/24/23 08:20 AM
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clarks summit pa
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Originally Posted by NITROUSN
Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.


Thank you, I appreciate it


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: E body transmission centerline [Re: 73cuda340] #3140402
04/24/23 02:54 PM
04/24/23 02:54 PM
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Originally Posted by 73cuda340
Originally Posted by NITROUSN
Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.


Thank you, I appreciate it
That measurement will vary from car to car depending on what the torsion bar tension is and which front and rear tires are on that car work scope shruggy
Your aftermarket hand made K member measurements may or may not be close to stock work shruggy

Last edited by Cab_Burge; 04/24/23 02:55 PM.

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Re: E body transmission centerline [Re: Cab_Burge] #3140415
04/24/23 03:57 PM
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[/quote] That measurement will vary from car to car depending on what the torsion bar tension is and which front and rear tires are on that car work scope shruggy
Your aftermarket hand made K member measurements may or may not be close to stock work shruggy [/quote]

He has been through most everything. Something is not right and no one can find the time to get that measurement.

Re: E body transmission centerline [Re: Cab_Burge] #3140428
04/24/23 04:26 PM
04/24/23 04:26 PM
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clarks summit pa
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Originally Posted by Cab_Burge
Originally Posted by 73cuda340
Originally Posted by NITROUSN
Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.


Thank you, I appreciate it
That measurement will vary from car to car depending on what the torsion bar tension is and which front and rear tires are on that car work scope shruggy
Your aftermarket hand made K member measurements may or may not be close to stock work shruggy


I called AL who converted the crossmeber right when I noticed the problem. It's the original factory crossmember that came on the car, he just removes the small block brackets and rewelds stock hemi brackets on with a jig that's built to factory specs. I guess anything is possible, so it could be off, but everybody online praises the guy and his work and I've never heard anything but how great his work is and how well everyones engines fit with them vs using the Schumacher engine conversion mounts. I don't see how this measurement could be different from car to car, other than slight variations of the floor pan, or how the tires or torsion bars could affect this? The ride height would change, but the engine and transmission wouldn't shift around since both crossmembers and floor pans stay the same


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: E body transmission centerline [Re: 73cuda340] #3140429
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Originally Posted by 73cuda340
The ride height would change, but the engine and transmission wouldn't shift around since both crossmembers and floor pans stay the same


Unless there's been damage in the past that altered things? The body section of the FSM gives that kind of info. This is for a 71 E body, I don't have it for a 73 and not sure how different they may be,

71 E body.JPG
Re: E body transmission centerline [Re: Sniper] #3140547
04/25/23 02:52 AM
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Originally Posted by Sniper
Originally Posted by 73cuda340
The ride height would change, but the engine and transmission wouldn't shift around since both crossmembers and floor pans stay the same


Unless there's been damage in the past that altered things? The body section of the FSM gives that kind of info. This is for a 71 E body, I don't have it for a 73 and not sure how different they may be,


1973 didn't come with hemi or BB, altogether different front K members shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: E body transmission centerline [Re: 73cuda340] #3140568
04/25/23 08:35 AM
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Originally Posted by 73cuda340
Does anybody know the correct centerline measurement for an e body 4 speed? Maybe from the center of the tailshaft to the floor pan? My engine is sitting low in the back and I'm trying to determine if the engine is too high or the transmission is too low.


I can't really help with the measurements as we run an auto but I had a similar problem on my '74 Challenger. The box section where the trans mount attaches to was pulling away from the unibody, the welds have given way probably due to engine torque and / or a few hard landings from big wheelstands. I welded it back on as best I could but still had to shim it under the trans mount pad to get it right, IIRC it was around 1/4". HTH's up
PS. My aftermarket K member also lowered the engine as my 2 1/4" headers will attest too grin

Last edited by Tig; 04/25/23 08:38 AM.

'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
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RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
Re: E body transmission centerline [Re: 73cuda340] #3140601
04/25/23 11:07 AM
04/25/23 11:07 AM
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Originally Posted by 73cuda340
Originally Posted by NITROUSN
Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.


Thank you, I appreciate it


Ok I have a 70 Cuda with a 426 hemi 4-speed. The block is one of the hemi's that has the factory big block ears and uses wedge motor mounts instead of hemi motor mounts so they bolt up to the factory k frame the same as a wedge. So the engine and transmission are both installed in the factory location with factory mounts.

I went out and crawled under it and the best I can measure is it's between 2 1/4" to 2 3/8" from the top of tail shaft to floor pan. Floor to center of tail shaft (center of yoke) between 3 1/2" to 3 5/8".

Hope this helps

Mike

Re: E body transmission centerline [Re: 73cuda340] #3140675
04/25/23 04:40 PM
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I crawled under the center of the tailshaft to the floor pan is about 2 1/2". The center of the tailshaft to the edge of the rocker is 26/" as best
I could measure since subframe connectors in the way.My car is 70 Challenger originally a n-code auto car now a RB with 4 speed.2"TTIs 3" exhaust and b-body dana.
Also had a TKO at one time that fit like crap.

Re: E body transmission centerline [Re: RTSE4ME] #3140698
04/25/23 06:10 PM
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Thanks you very much. I pulled the k member back out to try and see if there was anyway I that I could modify the engine mounts. I'll get a measurement when it's back in. Thanks again


1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi
Re: E body transmission centerline [Re: 73cuda340] #3140742
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No problem I found my 1/2" wrench I was missing while under the car.
Good luck!

Re: E body transmission centerline [Re: second 70] #3140848
04/26/23 01:22 PM
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Originally Posted by second 70
Originally Posted by 73cuda340
Originally Posted by NITROUSN
Originally Posted by RTSE4ME
If no one provides an answer in next couple of days, I can take some measurements.
Just need to do some musical cars.

Poster has been in a struggle and I doubt any one will help him. Simple center to floor measurement is all he needs.


Thank you, I appreciate it


Ok I have a 70 Cuda with a 426 hemi 4-speed. The block is one of the hemi's that has the factory big block ears and uses wedge motor mounts instead of hemi motor mounts so they bolt up to the factory k frame the same as a wedge. So the engine and transmission are both installed in the factory location with factory mounts.

I went out and crawled under it and the best I can measure is it's between 2 1/4" to 2 3/8" from the top of tail shaft to floor pan. Floor to center of tail shaft (center of yoke) between 3 1/2" to 3 5/8".

Hope this helps

Mike


Your engine is not mounted in the factory location , that is not how a Hemi was attached to the K frame on any factory built Hemi car .


running up my post count some more .
Re: E body transmission centerline [Re: 73cuda340] #3140851
04/26/23 01:33 PM
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Originally Posted by 73cuda340
Does anybody know the correct centerline measurement for an e body 4 speed? Maybe from the center of the tailshaft to the floor pan? My engine is sitting low in the back and I'm trying to determine if the engine is too high or the transmission is too low. Both engine and transmission mounts are brand new. Stock transmission crossmember and stock. al debevec hemi k member


what do you mean by " My engine is sitting too low in the back "

What exactly do you think is not at the right height/angle , the engine or the trans ? If you have the stock trans crossmember, with a stock mount, and a stock tailhousing on the trans then the trans is where it s supposed to be, the engine mounts being not in the factory location will cause either the tailhousing to angle down if the engine mounts set the engine higher or the tailhousing will angle upward if the engine is lower. If the mounts move the engine to one side of the other the tailhousing will angle in the opposite direction from where the engine is shifted. There isn't a lot of room between the centerlink and the oilpan , assuming you have a factory pan so that might be a good guage as to the engine being high or low , a piece of 3/4 think pine ( 1"x?) is what I usually stuff between the center link and the pan if I have to hang the engine without a trans on it for a short amount of time.


running up my post count some more .
Re: E body transmission centerline [Re: JohnRR] #3140854
04/26/23 01:44 PM
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Originally Posted by JohnRR
Originally Posted by 73cuda340
Does anybody know the correct centerline measurement for an e body 4 speed? Maybe from the center of the tailshaft to the floor pan? My engine is sitting low in the back and I'm trying to determine if the engine is too high or the transmission is too low. Both engine and transmission mounts are brand new. Stock transmission crossmember and stock. al debevec hemi k member


what do you mean by " My engine is sitting too low in the back "

What exactly do you think is not at the right height/angle , the engine or the trans ? If you have the stock trans crossmember, with a stock mount, and a stock tailhousing on the trans then the trans is where it s supposed to be, the engine mounts being not in the factory location will cause either the tailhousing to angle down if the engine mounts set the engine higher or the tailhousing will angle upward if the engine is lower. If the mounts move the engine to one side of the other the tailhousing will angle in the opposite direction from where the engine is shifted. There isn't a lot of room between the centerlink and the oilpan , assuming you have a factory pan so that might be a good guage as to the engine being high or low , a piece of 3/4 think pine ( 1"x?) is what I usually stuff between the center link and the pan if I have to hang the engine without a trans on it for a short amount of time.


It starts here John. https://board.moparts.org/ubbthreads/ubbthreads.php/topics/3123843/1.html

Re: E body transmission centerline [Re: JohnRR] #3140875
04/26/23 04:03 PM
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Originally Posted by JohnRR
[

Your engine is not mounted in the factory location , that is not how a Hemi was attached to the K frame on any factory built Hemi car .


John You're mistaken. The factory hemi and 440 wedge engines are mounted in the same location. The only difference is how it's done. The hemi doesn't use a different K frame to change it's location it uses it and different motor mounts because the exhaust manifolds won't fit with wedge mounts.

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