TheAMCForum.com Homepage
Forum Home Forum Home > The Garage > Transmission & Drivetrain
  New Posts New Posts RSS Feed - 998 Convertor
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

998 Convertor

 Post Reply Post Reply
Author
Message
lrallen View Drop Down
Supporter of TheAMCForum
Supporter of TheAMCForum
Avatar

Joined: Jul/19/2007
Location: Ohio
Status: Offline
Points: 342
Post Options Post Options   Thanks (0) Thanks(0)   Quote lrallen Quote  Post ReplyReply Direct Link To This Post Topic: 998 Convertor
    Posted: Aug/08/2022 at 5:50pm
I have the 998 non lockup trans. and putting it behind a 401 engine both are 1978 models. The convertor on the 998 has a bigger snout then the 727 that was behind the 401. The difference is very slight but it will not work. can the snout be turned down a small amount on the 998? Any advice is needed. This is in a Concord and do not want to hack the tunnel up for the 727. The car is mint and come with the 304.  Thank you
AMC Forever
Back to Top
1970390amx View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/11/2008
Location: colorado
Status: Offline
Points: 3312
Post Options Post Options   Thanks (1) Thanks(1)   Quote 1970390amx Quote  Post ReplyReply Direct Link To This Post Posted: Aug/10/2022 at 8:01pm
The 78 401 most likely came out of a jeep with a turbo 400 in it. The crank would have a very thin sleeve in it because the 400 snout is slightly smaller than a torque flite converter 
1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box
Back to Top
WhatISit View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Aug/07/2017
Location: Phoenix, AZ
Status: Offline
Points: 0
Post Options Post Options   Thanks (0) Thanks(0)   Quote WhatISit Quote  Post ReplyReply Direct Link To This Post Posted: Aug/10/2022 at 8:04pm
I had a 727 converter in my 998 if I remember correctly. I don't remember any dimensions being different. I do remember one brand having a hard time supplying me with the correct converter for some reason though. I think the slot in the "snout" of the converter wasn't cut in deep enough or something odd like that.

*edit* I believe it was actually a 904 converter.


Edited by WhatISit - Aug/10/2022 at 8:09pm
Back to Top
Heavy 488 View Drop Down
AMC Addicted
AMC Addicted


Joined: Apr/27/2019
Location: In the
Status: Offline
Points: 3529
Post Options Post Options   Thanks (1) Thanks(1)   Quote Heavy 488 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/10/2022 at 8:31pm
As it was said, jeeps with the th400 have a sleeve that has to be removed for a torqueflite
Back to Top
lrallen View Drop Down
Supporter of TheAMCForum
Supporter of TheAMCForum
Avatar

Joined: Jul/19/2007
Location: Ohio
Status: Offline
Points: 342
Post Options Post Options   Thanks (0) Thanks(0)   Quote lrallen Quote  Post ReplyReply Direct Link To This Post Posted: Aug/11/2022 at 8:50am
Thank you all for the help. I will be checking the crank out. How would I get the sleeve out?   Thank You
AMC Forever
Back to Top
devildog80 View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Jul/29/2022
Location: Apache Junction
Status: Offline
Points: 143
Post Options Post Options   Thanks (0) Thanks(0)   Quote devildog80 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/11/2022 at 8:02pm
Your trying to get the pilot bearing out of the crank?

Take a piece of soft bread....yes a piece of bread from the kitchen.

Ball it up and shove it into the pilot hole getting as much in as you can.

Now get a flat face punch as close to the pilot hole size you can, and drive the bread into the hole with the punch and BFH.

The bread will be forced in behind the pilot bearing and push the bearing out.

Clean the bread out and insert the correct pilot bearing :)

EDIT
Wheat bread is more healthy.......just joking, as it does not matter which kind it is, but the softer more dense bread works better!


Edited by devildog80 - Aug/11/2022 at 8:05pm
'81 CJ5 Base, 258 I6, MC2100, T176 4 spd, 300 TC, D30 Front NT, 3.31, 2-Piece AMC 20 rear NT, 3.31
'84 Grand Wagoneer, 401 V8 (.030 over), MC2150, 727, ST NP229, AMC 20 Rear - D44 Front - WT 3.31
Back to Top
matty 401 View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/06/2007
Location: Iowa
Status: Offline
Points: 1730
Post Options Post Options   Thanks (1) Thanks(1)   Quote matty 401 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/12/2022 at 8:16am
it is a thin sleeve  i cut mine with a dremel  came out pretty easy 
72 matador 401 the beast
79 concord 2 door
72 matador 304 grasshopper
68 Rogue 406
93 Cherokee 4.0 5 speed

Back to Top
79 SPirit View Drop Down
AMC Apprentice
AMC Apprentice


Joined: Aug/16/2022
Location: Southeast
Status: Offline
Points: 59
Post Options Post Options   Thanks (0) Thanks(0)   Quote 79 SPirit Quote  Post ReplyReply Direct Link To This Post Posted: Aug/17/2022 at 3:03am
A 727 will fit the car without any hacking. You better beef up the 998 if your 401 is making over 400hp
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 0.234 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or