NP435 installed with problems.....help

[mp]

I finally got my 435 installed yesterday, but stabbed the shifter in, and only third gear worked. so today, I popped the shifter back out, and used a mirror to line up the gates. Reinstalled the shifter, and now it won't move. I can only shift into 1st and reverse, but when I let off the clutch, it dies like I am in a high gear (4th?) I put the transfer case in neutral, and it still stalls out before moving and as soon as I let off the clutch.

Can any of you gurus troubleshoot this for me? It worked on the bench.

I used a two wheel drive NP435, a 1 inch adapter plate from 66halfcab, and a 6 cylinder intermediate housing. I did not cut off the inch of threads on the NP435 output shaft, as it did not appear to need to disappear. Installed a new flywheel, starter, and clutch--again, it up and drove yesterday in third gear.

Any suggestions before I give up and take this thing to a shop?

 

[raleigh_bronco]

What I learned was if you don't have those little pads on the tips of the U shaped forks it doesn't shift well. Also, did you go through the thing before installing and are you sure the shifter was installed with the rods all aligned correctly.

 

[kyle]

What length bolt did you use on the bottom drivers side of the plate? I found that when I used a 1 1/2" bolt it interferred with the gears. Also do you have both of the shift rails lined up or only the one?

 

[mp]

I have the u's facing each other. I even have a spare top that I used as a mock up, and it looks the same as what the mirror shows in the case.

All the plastic pads were on when the top cover was tightened up.

I am leaning towards the bolt in the plate being too long.......I think it was 1.5 inches.

Unfortunately I am out of daylight and time. Tomorrow morning it goes on a flat bed tow truck to the tranny shop. I will let them know what I think.

So much for my low budget swap.....this is going to get expensive.

 

[kyle]

I just did the same conversion with the same plate. I found that if you use any bolt longer than 1 1/4" on the bottom drivers side of the plate it does not allow the reverse gear to disengage and will bind the transmission. Fortunately I found this when it was still on the floor in the garage. You will have to pull off the transfer case and 6 cyl housing replace this bolt and then you should be in good shape. I would do this before you send it to the shop.

 

[kyle]

This is the bolt that I am referring to.

 

[ManTruck]

I just did the same conversion with the same plate. I found that if you use any bolt longer than 1 1/4" on the bottom drivers side of the plate it does not allow the reverse gear to disengage and will bind the transmission. Fortunately I found this when it was still on the floor in the garage. You will have to pull off the transfer case and 6 cyl housing replace this bolt and then you should be in good shape. I would do this before you send it to the shop.

I agree with this.

 

[mp]

Pulled the t-case, swapped out the bolt, and the problem still exists. Still won't shift into 2nd, 3rd, or 4th. When I let out the clutch in 1st or Reverse, it acts like it is engaged, and wants to die. Any other ideas, before i have it towed to a shop?

 

[Pa PITT]

shift rails

I Did This On A Big Tractor It Would Die When I Let Out On The Clutch
Well I Had My Shifter I Front Of The Rails Instead Of In Them.. I Could Move One Gear Back So I Was In 2 Gears At The Same Time ..this Sound Like What Is Happing To You ..if You Fixed The 1 1/4 Bolt ....
Pa Pitt

 

[kyle]

Did you remove the top cover at any time? If so it sounds like the shift forks might not be lined up properly.

 

[kyle]

When installing or removing the top cover it's easiest to clock it slightly counter clockwise to clear the forks.

 

[kyle]

Any Luck?

 

[mp]

Any Luck?

Kyle-

I did remove the cracked cover with the other you included, so I did pop and replace the top. I also failed to bench test AFTER I put on the new top cover.....I was so anxious to get it installed, I forgot.

Tomorrow I will unbolt my exhaust again, and drop the NP435. Hopefully I didn't cause any damage.

 

[66Gasgrill]

I had the same problem out of mine. Same conversion, changed the bolt still nothing. I think I pulled it back apart, and took the top cover back off. If memory serves I moved the gears around until the tranny was in neutral the reinstalled the top cover with the shift forks in the neutral position and it worked fine.

 

[jimmyhat]

mp any word on the problem im watching cause im next in line for this swap

 

[bronco italiano]

When I rebuilt SHEMP Walkers NP435 I was lucky that I did bench check the gears as the shift forks are very tricky to align properly. I bet that is your problem. Yank that out and remove the top cover and retry the placement. It took me a few time to get it right. Good Luck, BI