Author Topic: D20 binding up  (Read 4229 times)

D20 binding up
« on: 08/23/09, 07:58PM »

Offline 2jeepdrivers

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I recently got finished with my twin sticks on my D20 in my Scout/J20 hybrid.  For some reason if I lock the front in it is binding up everything so bad I can't get the tranny in gear or shift the t-case. This is with no rear drive shaft in and the front axle turns freely.  I have tried it with the rear axle in neutral and high and low whichever I had the front axle in at the time.  If I kick the front into neutral and engage the rear I can shift fine. I am not familiar enough with gear drive cases to know what is causing this problem. So if anyone knows what is doing this please give some input.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor

Re: D20 binding up
« Reply #1 on: 08/24/09, 01:04AM »

Offline willysman22

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Was this case rebuilt or disassebled recently? Disconnect your front output shift rail from the cab and shift it where you can feel the detents.If you have to,take the oil pan off and make sure the sliding gear(both the front output and the rear have one,they are spur cut)on the front output is COMPLETY up against either the helical high range gear(for high)or meshing with the spur cut gear in the cluster intermediate gear(low range).In front high, the front sliding gear should be all way forward and the rear sliding gear should be in between gears.Both sliding gears should have the shift fork race part of the gear facing rearward.If they don't you have a problem.
PS ,I had a dana 20 gearset out for reference.

« Last Edit: 08/24/09, 02:37AM by willysman22 »
80' short-bed Toyota, Lexus V8, yota' stuff
09' Suzuki Kingquad 750AXI
48'Willys CJ2A
18' Jeep JLU Sport HT

Re: D20 binding up
« Reply #2 on: 08/24/09, 09:22PM »

Offline 2jeepdrivers

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The case has never been apart that I know of. If I don't have the engine running I can shift it in and out of high or low front or rear and spin the outputs by hand no problem. I am starting to wonder if it isn't something else. I know it is not my front axle I have inspected everything on it and everything is like new. The tranny shifts good and if I just put it in rear wheel drive I can go through all the gears and never have a problem, I am just not real sure what it is at this point.  I am trying to get an auto with a different t-case all of this stuff worked fine until I put it in this rig. If someone has an auto with t-case to sell or would be interested in trading for a t18 w/ D20 with a wilwood pedal and master and speedway hydraulic slave let me know.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor

Re: D20 binding up
« Reply #3 on: 08/24/09, 09:57PM »

Offline willysman22

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Are the brakes free? How about a u-joint binding?Is the clutch adjusted correctly?Just throwing things out.
80' short-bed Toyota, Lexus V8, yota' stuff
09' Suzuki Kingquad 750AXI
48'Willys CJ2A
18' Jeep JLU Sport HT

Re: D20 binding up
« Reply #4 on: 08/24/09, 10:59PM »

Offline 2jeepdrivers

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New brakes all around that are free all new u-joints and I can spin everything by hand so I don't think there is any binding. It has a new clutch that I just put in with an aftermarket hydraulic slave and wilwood pedals with masters. I don't think it is clutch related because if I am in rear wheel drive I can shift through all of the gears no problem.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor

Re: D20 binding up
« Reply #5 on: 08/24/09, 11:24PM »

Offline willysman22

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Thats really strange.Will the vehicle move in RWD or don't you have a rear Driveshaft?Wait, is there a large snap ring that retains the rear bearing retainer between the trans and trans adapter ?Mabye a snap ring is missing and causing the transmission mainshaft to walk under a torque load(FWD)and is jamming the retainer against the gears in the tcase.If you have a rear driveshaft,install it and try to see if it does this in rwd also.
80' short-bed Toyota, Lexus V8, yota' stuff
09' Suzuki Kingquad 750AXI
48'Willys CJ2A
18' Jeep JLU Sport HT

Re: D20 binding up
« Reply #6 on: 08/25/09, 07:00AM »

Offline 2jeepdrivers

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I have class tonight but when  I get home tonight I am going to do that. I also discovered last night that if I jack up the front tire about an inch I can go through the gears in FWD so I am thinking my driveshaft is binding up.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor

Re: D20 binding up
« Reply #7 on: 08/26/09, 10:21PM »

Offline 2jeepdrivers

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I figured it out. I changed out the double cardigan joint on the driveshaft and it works great so something it it was bent or warped I never did figure that out but at least I know it all still works. But I am really uncomfortable with how close my clutch master is to my exhaust manifold since I am right hand drive so I am trying to go automatic now I don't know that it would cause problems but after I ran the engine for about ten minutes the master was getting warm so I am afraid that with long periods of run time it will just be to much heat.  That and I can't get used to the shift pattern being backwards.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor

Re: D20 binding up
« Reply #8 on: 08/26/09, 10:29PM »

Offline willysman22

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Is there enough room to put some insulation between there? I'm sure you could work a way around the heat issue.By the shift pattern being backwards,do you mean reverse is up and to the left?Some older t18s had reverse next to low or mabye it was by 3rd,I can't remember.
80' short-bed Toyota, Lexus V8, yota' stuff
09' Suzuki Kingquad 750AXI
48'Willys CJ2A
18' Jeep JLU Sport HT

Re: D20 binding up
« Reply #9 on: 08/28/09, 06:35PM »

Offline 2jeepdrivers

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My scout is right hand drive so first is away from me and I work my way back towards me.  It looks like I am also having pressure plate problems. I think I am just going to fix the four speed and maybe swap it later. I have to have the rig ready by oct 10 for my wedding in Disney so I am having to do the quickest things possible.
55' Willys Wagon Injected AMC 360, th400, 203/205, D44,12bolt
66' CJ6 in process of 302,c6,D44's,33's, soa and coils, full cage and some armor