4r70w replacement gone awry
11-20-2018, 11:03 AM
#1
4r70w replacement gone awry
In the process of replacing the 4r70w on my 01 Lariat 4x4. Have the replacement trans (donor is a 98 f150 4x4) installed (replaced the rear main while the trans was out), transfer case installed, rear drive shaft installed and all relevant electrical connectors. My current issue is trying to spin the crank to install the TC nuts -- if I put an 18mm socket on a 3/8 breaker bar and try to spin the crank there's no movement. I've tried CW and CCW with no joy. Tonight as the weather allows I'm going to try pulling (most of) the plugs/removing the serp belt and trying again. I have 2 nuts on right now because I could reach them through the inspection plate on the bottom of the trans/hole in the block. I know the engine was free when we started this project over a month ago because there was no issue getting the TC nuts off the old trans/TC.
I've let the truck sit a month or so in the past without any issues starting so I'd be fairly surprised if it was hydrolocked somehow from sitting.
Greatly appreciate any input from you guys! TIA
I've let the truck sit a month or so in the past without any issues starting so I'd be fairly surprised if it was hydrolocked somehow from sitting.
Greatly appreciate any input from you guys! TIA
11-20-2018, 02:45 PM
#2
Senior Member
Is the bell housing all bolted up? If so, can you spin the TC freely without the bolts in it? Making sure you are fully seated.
11-20-2018, 02:55 PM
#3
Yep, the bell housing is bolted up to the back of the motor and everything behind it is installed.
You're suggesting I take the bell housing off and check the seating of the TC?
You're suggesting I take the bell housing off and check the seating of the TC?
Last edited by Joshua Leeds; 11-20-2018 at 03:32 PM. Reason: improper conjugation of a work
11-20-2018, 03:30 PM
#4
Senior Member
If you can not spin it freely, yes, it could be the issue of not being seated.
11-20-2018, 03:48 PM
#6
Senior Member
No need to pull it back. If you have all of the bolts out, it should spin if it is the correct converter, and seated properly. Easiest way there is to check if it is on a bind.
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Joshua Leeds (11-20-2018)
11-20-2018, 03:58 PM
#7
Thanks!
Just so that I can see this in my head clearly... unbolting the bolts from the bell housing/block will release extra pressure that may be put on the TC thus allowing the TC/crank to spin together (when the trans isn't in park?) because of the studs from the TC going into the flex plate if the TC is the right one and installed properly. Correct?
Just so that I can see this in my head clearly... unbolting the bolts from the bell housing/block will release extra pressure that may be put on the TC thus allowing the TC/crank to spin together (when the trans isn't in park?) because of the studs from the TC going into the flex plate if the TC is the right one and installed properly. Correct?
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11-20-2018, 04:00 PM
#8
Senior Member
No.... if you have any of the 4 bolts that bolt the converter to the flexplate, they need to be removed. The converter should spin freely if it is not locked up to the flex plate. Sorry for the confusion.
IF you can not spin it, THEN you need to pull the trans and check for a damaged seal, then try again.
IF you can not spin it, THEN you need to pull the trans and check for a damaged seal, then try again.
11-20-2018, 05:57 PM
#10
Senior Member
Thank you, I will indeed try.