IH PARTS AMERICA
Click Here!

Go Back   IH PARTS AMERICA > Tech Forums > Transmission Tech
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read Photo Gallery IH Store Home

Reply
 
Thread Tools Display Modes
Old 04-07-2018, 02:49 PM   #1
dylancw
Junior Member
 
Join Date: Jan 2018
Member Number: 9090
Posts: 10
Default T28 (BW model 8) stall in drive or reverse

Hello,

I'm trying to understand what's wrong with the transmission in my 1100c Travelall. If I set the idle normally, when I shift into drive or reverse, it jerks forward and stalls. I can raise the idle to around 1500 and it will stay running but act as though it's under a lot of load.

It almost feels like the torque converter is locking up at a very low rpm? I tried screwing the vacuum control unit out to reduce control pressure, not sure that worked honestly. Going to try to do fluid change, it's tight under there near that cross member.

Wondering if anyone else has experienced this? I'm new to Travelalls.

Thanks!

Dylan
dylancw is offline   Reply With Quote
Old 04-09-2018, 06:22 AM   #2
Scoutboy74
Moderator
 
Scoutboy74's Avatar
 
Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,989
Default Re: T28 (BW model 8) stall in drive or reverse

How's the engine tune condition on this vehicle? Do you have a vacuum gauge that you could connect to a manifold vacuum source for readings that could either indicate or rule out a vacuum leak?
__________________
Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
Scoutboy74 is offline   Reply With Quote
Old 04-09-2018, 06:29 AM   #3
dylancw
Junior Member
 
Join Date: Jan 2018
Member Number: 9090
Posts: 10
Default Re: T28 (BW model 8) stall in drive or reverse

Good vacuum pressure at idle, or at high idle, when in park or neutral. Just had carb rebuild and a lot of vacuum tubing replaced, and vacuum brake booster replaced. Vacuum drops below 10 at idle in Drive or Reverse but engine RPM is also very low. Just feels like it's under heavy load when in gear.
dylancw is offline   Reply With Quote
Old 04-09-2018, 06:42 AM   #4
Scoutboy74
Moderator
 
Scoutboy74's Avatar
 
Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,989
Default Re: T28 (BW model 8) stall in drive or reverse

Have you read this thread:

https://forums.ihpartsamerica.com/sh...ad.php?t=13271

Might be of some help. I can figure my way around a fair amount of TF727 issues, but I'm next to clueless when it comes to your transmission model. Do you have a factory service manual?
__________________
Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
Scoutboy74 is offline   Reply With Quote
Old 04-11-2018, 01:47 PM   #5
dylancw
Junior Member
 
Join Date: Jan 2018
Member Number: 9090
Posts: 10
Default Re: T28 (BW model 8) stall in drive or reverse

Quick update. Figured out that vacuum gauge dropped below 10 in gear. Vacuum modulator diaphragm is leaking vacuum badly. It was a real escapade to find one to order, finally found Rambler parts sites. I also ordered a transmission rebuild kit.

The other clue is it seemed like the ATF level was too high. Maybe it's not flowing fluid all the way through.

I guess I'm also looking for a 727 as a backup plan.
dylancw is offline   Reply With Quote
Old 04-12-2018, 11:30 AM   #6
Greg R
Senior Member
 
Join Date: Jul 2008
Member Number: 527
Location: Lebanon, OR
Posts: 772
Default Re: T28 (BW model 8) stall in drive or reverse

Quote:
it seemed like the ATF level was too high
How did you check the ATF level?
Greg R is offline   Reply With Quote
Old 04-12-2018, 02:12 PM   #7
dylancw
Junior Member
 
Join Date: Jan 2018
Member Number: 9090
Posts: 10
Default Re: T28 (BW model 8) stall in drive or reverse

When I initially checked level the truck had been sitting. Used the trans dipstick from engine compartment. When I pulled the vacuum modulator off later I noticed that it seemed like an awful lot of trans fluid in the sump (took off a few quarts above the line of the vacuum modulator hole).

I ordered a new filter and pan gasket. Hoping to find something like a clogged pickup or bad pump.
dylancw is offline   Reply With Quote
Old 04-12-2018, 05:59 PM   #8
dylancw
Junior Member
 
Join Date: Jan 2018
Member Number: 9090
Posts: 10
Default Re: T28 (BW model 8) stall in drive or reverse

Great news! 90% vacuum leak in the modulator, 10% previous owner overfilling transmission with ATF. Shifts wonderfully now and doesn't stall. Now on to new tires, suspension bushings, then bodywork and paint... And hopefully power steering. Gosh it's hard to steer without power steering.
dylancw is offline   Reply With Quote
Old 04-13-2018, 06:37 AM   #9
Scoutboy74
Moderator
 
Scoutboy74's Avatar
 
Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,989
Default Re: T28 (BW model 8) stall in drive or reverse

Good job and thanks for wrapping this up.
__________________
Favorite hobby...Driving Salma Hayek in my Scout

Coal Trickle - '99 Dodge Ram 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500
Hooty - '74 SII - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/RC 4" SUA/34x10.5 TSLs/33g Fuel/HFT 8k winch
Mongo - '71 1210 Std Cab 2WD - 345/TF727/RA17 D60 4.10 Trac-lok - "Mongo love candy! Duh, huh, huh!"
Scoutboy74 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 05:18 PM.