Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 08-25-2016, 03:03 AM   #1
Junior Member
 
Brand: Thor Motor Coach
State: West Virginia
Posts: 26
THOR #1006
Reverse issues

This is a new one for me. Parked my coach ( 1998 Thor on Chevy P30 chassis) last year and it hasn't been moved this year.
I had a leaking tranny pan so I took this off and replaced the fluid and filter and installed a new gasket. Problem solved.
Now, when trying to move the coach, it goes into gear and moves forward. When put into reverse it feels to be shifting but will not roll backwards. It almost feels like the parking brake is on. So, I wanted to pull it backwards about ten feet to where it was on a concrete pad and it will not move backwards, even in neutral.
Is there a reason that the coach would pull itself forward but will not move backward, even in neutral? Could it have something to do with the parking brake malfunctioning? The parking brake light comes on and goes off when using the switch but not sure how to check if it is operating correctly.
__________________

__________________
skag101 is offline   Reply With Quote
Old 08-26-2016, 01:29 AM   #2
Senior Member
 
schreinertms's Avatar
 
Brand: Thor Motor Coach
Model: Challenger 37TB
State: Pennsylvania
Posts: 410
THOR #4486
Does it feel like the parking brake is on when you move forward, in other words, do you feel resistance when it moves forward? I assume is has an Auto Park Brake.
__________________

__________________
Tom and Lisa
Pennsylvania
2015 Challenger 37TB
2015 Ford Taurus toad
schreinertms is offline   Reply With Quote
Old 08-26-2016, 01:41 AM   #3
Senior Member
 
schreinertms's Avatar
 
Brand: Thor Motor Coach
Model: Challenger 37TB
State: Pennsylvania
Posts: 410
THOR #4486
Found this article online.

Chevy P-30 Auto Parking Brake (welcome to our nightmare)

I had my Auto Park Brake lock up on me once while driving thru a parking lot.
I was very glad to get rid of that P30 motorhome cause the braking system scared me.

Thank god most gas chassis' now use normal car like parking brake systems.
__________________
Tom and Lisa
Pennsylvania
2015 Challenger 37TB
2015 Ford Taurus toad
schreinertms is offline   Reply With Quote
Old 08-26-2016, 02:11 AM   #4
Senior Member
 
saddlesore's Avatar
 
Brand: Still Looking
Model: SOB
State: South Dakota
Posts: 592
THOR #3916
several questions....
1) is your parking brake simply applied via cable....OR do you have a hydraulic pump that compresses a big arsed spring? If you have the pump setup (my '99 34H did), can you hear the pump when you release the brakes (Yellow button on the dash that you have to push in)
NOTE! the hyd pump uses hydraulic oil...NOT ATF! (don't ask how I know this)
Also crawl under and make sure that the brake shoes haven't froze to the parking brake drum..been there....dun that
2) Check to see if you have a brake master cylinder seized up and won't release the pressure to the brakes wheel cylinders...With GM chassis with hydraulic brakes this is a common occurrence when left sitting for a long time (again don't ask how I know this)
3) If it is in the tranny you may have an air bubble in the lines which won't permit the shift selector to receive the oil pressure needed to go into reverse....(AAMCO time)
__________________
current coach
SOB (some other brand)
former coach
Thor Infinity
saddlesore 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 02:40 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×