4l80e early vs late "hub height" difference
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
4l80e early vs late "hub height" difference I have never seen this mentioned before. In fact I have only used overall height when specing converters
but transstar offers everything in two hub heights for early vs late
https://www.transtar1.com/products/t...rque-Converter
I build only a few pre-'97 unit a year so I dont run into this much but i'd sure like to know!
but transstar offers everything in two hub heights for early vs late
https://www.transtar1.com/products/t...rque-Converter
I build only a few pre-'97 unit a year so I dont run into this much but i'd sure like to know!
TECH Junkie
Joined: Jun 2008
Posts: 3,202
Likes: 1,390
From: Nitro Alley
I have never seen this mentioned before. In fact I have only used overall height when specing converters
but transstar offers everything in two hub heights for early vs late
https://www.transtar1.com/products/t...rque-Converter
I build only a few pre-'97 unit a year so I dont run into this much but i'd sure like to know!
but transstar offers everything in two hub heights for early vs late
https://www.transtar1.com/products/t...rque-Converter
I build only a few pre-'97 unit a year so I dont run into this much but i'd sure like to know!
Mistakes happen in TC manufacturing, just like anything else.
The more and more rebuilding that I have done with Engines, Transmissions, Transfer-Cases, Differentials, Carburetors, Turbochargers, Alternators, Power-Steering Pumps, Etc...
The less and less I trust "out of the box" measurements... and the need to double check all critical measurements and clearances.
Pressure Regulator Springs came up recently... I has two of them bite me in the *** years ago...
Now every single Spring gets checked on one of my Pistol Spring Testers.
I refuse to get fooled another time.
Another type of Spring that requires meticulous testing would be Engine Valve-Springs...
The Spring Pressures and Heights vary a good amount; so I always have to painstakingly Shim them into Spec.
Last edited by vorteciroc; Jun 6, 2021 at 06:11 PM.
Thread Starter
Joined: Nov 2013
Posts: 6,389
Likes: 558
From: Portlandia
I'd say most of my customers are using stock height 4l80e converters, the nominal 6.8" from tip of pump drive to converter pads. Only a few request converters built for 4l60e "dished" type flexplates. Most manage to get the right assemblage of parts. Thankfully only now and then do I come across someone who has a mismatch in parts and bolts it together and tries to run it anyways.
I guess my post was kind of ambiguous as what I'm actually asking. I'm confused on application of this hub height measurement.
What are they actually measuring to get this height? Do the converters not interchange between the early/late pump types? What are the year models that do which?
I guess my post was kind of ambiguous as what I'm actually asking. I'm confused on application of this hub height measurement.
What are they actually measuring to get this height? Do the converters not interchange between the early/late pump types? What are the year models that do which?
