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12-15-2020, 06:45 AM
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#1
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Senior Member
Brand: DRV
Model: 38 RSB3
State: South Dakota
Posts: 2,280
THOR #1658
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Replacing a slide gearbox
Replacing a slide gearbox
The replacement gearbox I received was an updated version and has a tall raised collar at the output shaft. (See the difference on picture # 1) If this happens to you, you will need to do the additional steps at the bottom.
1. Cover the top of the slide with cardboard to keep grease off it.
2. Take some nail polish and mark both chains so when you reinstall the chain back on the sprockets of the gearbox you can line them up properly. (See picture # 2)
3. On the adjuster block, loosen the jam nut, then loosen the adjuster nut to create slack in the chain. Do this to all four adjuster blocks. (See picture # 3) I took the front adjuster blocks on each side completely apart to make it easier to maneuver the chain from the sprockets. (See picture # 4)
4. Remove the chain on both sprockets of the gear box.
5. Remove the two nuts at the bottom of the gearbox. (See picture # 5.) Remove the carriage bolts.
6. Slide the gearbox off of the “drive shaft” that connects the motor to the gearbox. If you do not need to replace the bracket, reverse these steps to reinstall the new gear box.
If you have the updated version of the gear box:
1. Remove the two bolts that secure the motor to the bracket.
2. Remove the five screws mounting the bracket to the wall. (I took a sharpie and drew a line on the side and some of the top to make sure the new bracket was installed in the same place)
3. Reverse all of the stops to install the updated version of the gear box.
***When tightening the adjuster blocks, make sure that they are straight. They need to pass each other without touching.
***My gearbox was for the bed slide. My slide was halfway out. There was limited work space and a lot of the work was done by feel. The project took me three hours to complete.
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2016 DRV38RSB3
2015 Ram 3500 Regular Cab DRW CTD Asian trans 410 rear
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12-15-2020, 12:42 PM
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#2
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Junior Member
Brand: Thor Motor Coach
Model: Venetion
State: Nevada
Posts: 23
THOR #19899
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Nice job, Thanks for the post!
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12-15-2020, 04:27 PM
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#3
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Senior Member
Brand: DRV
Model: 39TKSB3 "Modified"
State: South Dakota
Posts: 1,838
THOR #1661
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NICE!
Now I know who to call when mine needs replacing!
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12-15-2020, 05:06 PM
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#4
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Senior Member
Brand: DRV
Model: 2019 MS 39DBRS3
State: Delaware
Posts: 557
THOR #9431
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Will be interesting to find out if it was a gear failure and if the gears are plastic.
Ford Super Duty mirrors use plastic gears and they fail on occasion.
Don't know if they are still available but there was an individual on the FTE forum that was making replacement gears out of brass. IIRC he was charging around $65
If that was your failure it might be worthwhile to see if an upgraded gear could be made at a cost that makes replacing the gearbox more expensive.
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Thanks,
Duane
2019 DRV MS 39DBRS3
2020 F-450
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12-16-2020, 03:39 PM
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#5
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Junior Member
Brand: DRV
Model: 41 RSSB 4
State: South Dakota
Posts: 27
THOR #3565
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slide gearbox
I ,also, have had a gearbox failure in the past and replaced same. after i tore down bad gearbox to see what failed. gears where all ok, the problem is the gear SHAFT does not have an adequately BOSSED area in the case so it brakes out internally and than the gears do not mess and break. MAYBE the new gearbox has that BOSS on there for that reason ? just my thoughts
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ARCliz - retired IBEW / FULLTIMING
2013 RAM 3500 Mega Cab DRW / 3.42
2016 DRV 41RSSB4 ( plus 1 ) PERSONNELIZED
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12-16-2020, 04:35 PM
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#6
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Senior Member
Brand: DRV
Model: 39TKSB3 "Modified"
State: South Dakota
Posts: 1,838
THOR #1661
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You would hope the change is a reliability improvement.
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12-16-2020, 09:03 PM
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#7
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Senior Member
Brand: DRV
Model: 38 RSB3
State: South Dakota
Posts: 2,280
THOR #1658
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Quote:
Originally Posted by Cummins12V98
You would hope the change is a reliability improvement.
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You would hope so.
__________________
2016 DRV38RSB3
2015 Ram 3500 Regular Cab DRW CTD Asian trans 410 rear
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12-17-2020, 02:33 PM
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#8
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Junior Member
Brand: DRV
Model: 41 RSSB 4
State: South Dakota
Posts: 27
THOR #3565
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I have found that MANUFACTURES tend to make things BREAK !!! that way they SELL more . Built a lot of DESTRUCTIVE testing facilities, if it works too well , NOT GOOD , by their standards !!!!!!!!
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ARCliz - retired IBEW / FULLTIMING
2013 RAM 3500 Mega Cab DRW / 3.42
2016 DRV 41RSSB4 ( plus 1 ) PERSONNELIZED
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06-17-2021, 01:21 AM
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#9
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Junior Member
Brand: DRV
Model: 39DBRS3
State: South Dakota
Posts: 12
THOR #4522
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Replacing a slide gearbox
Ryan, did you support the slide on the outside in any manner? I read a post on another brand trailer where they put supports under the bottom of the slide down to the ground. Thanks…John
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Full Timers
2016 39DBRS3
2015 F350
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06-17-2021, 07:17 AM
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#10
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Senior Member
Brand: DRV
Model: 38 RSB3
State: South Dakota
Posts: 2,280
THOR #1658
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Quote:
Originally Posted by ilpuller
Ryan, did you support the slide on the outside in any manner? I read a post on another brand trailer where they put supports under the bottom of the slide down to the ground. Thanks…John
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Not at all.
__________________
2016 DRV38RSB3
2015 Ram 3500 Regular Cab DRW CTD Asian trans 410 rear
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