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Help with a 980B Transmission

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oarwhat

Senior Member
Joined
Dec 14, 2009
Messages
840
Location
buffalo,n.y.
Hi all. We have a 980B 89P05XX that doesn't have 4th gear. A local guy has a good trans from a 42H1XXX. Will it work? I've gone through the parts list and the case is different. I know it's a strange question but I'm hoping some one will know. Thanks Randy
 
AmerIndependent

AmerIndependent

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Joined
Nov 4, 2009
Messages
359
Location
Riverside, CA
Occupation
Caterpillar Powertrain Rebuild & Repair Specialist
The 42H model transmission will not work in an 89P application without making some modifications. We have a rebuilt 980B transmission that will work for you if interested.
 
O

oarwhat

Senior Member
Joined
Dec 14, 2009
Messages
840
Location
buffalo,n.y.
Can you or anyone tell me what modifications are needed? I can get this rebuilt 42h transmission very reasonable. Thanks
 
B

Bob/Ont

Senior Member
Joined
Sep 18, 2012
Messages
1,605
Location
Ontario
oarwhat said:
Hi all. We have a 980B 89P05XX that doesn't have 4th gear. A local guy has a good trans from a 42H1XXX. Will it work? I've gone through the parts list and the case is different. I know it's a strange question but I'm hoping some one will know. Thanks Randy
Click to expand...

Randy, did 4th gear just start slipping or has it been out for a long time?
Later Bob
 
O

oarwhat

Senior Member
Joined
Dec 14, 2009
Messages
840
Location
buffalo,n.y.
Hey Bob It's been out since I bought it 5-6 years ago. It doesn't try to move at all. Just like it's in neutral. Thanks Randy
 
B

Bob/Ont

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Sep 18, 2012
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1,605
Location
Ontario
oarwhat said:
Hey Bob It's been out since I bought it 5-6 years ago. It doesn't try to move at all. Just like it's in neutral. Thanks Randy
Click to expand...

Just a heads up on that. Back in the late 70's I saw. A new 980 loose 4th. After it was rebuilt, I test ram it around the yard. ran great and then as I was about to park it. I put it into neutral and let it coast.
It started to slow down like the brakes were dragging. I got it up to speed and tried again, it dragged in every gear but 4th.
They tore it down again and after much research found a small hole that wasan't drilled al the way through. Once 4th clutch was filled it wouldn't drain enough to release and took out the clutch. I say this because 4th is an od clutch to lose. Might be best to run as is or use different trans. Your trans mightbe like that old one.
Later Bob
 
O

oarwhat

Senior Member
Joined
Dec 14, 2009
Messages
840
Location
buffalo,n.y.
Hey Bob That's interesting. Do you know the difference from a 980 42H and a 89P 980B tranny? I went through the whole parts list and the only difference was the case that I could see. I've found a NOS rebuilt one for a 42h for cheap and would like to know what I would have to do to use it. Thanks again Randy
 
B

Bob/Ont

Senior Member
Joined
Sep 18, 2012
Messages
1,605
Location
Ontario
oarwhat said:
Hey Bob That's interesting. Do you know the difference from a 980 42H and a 89P 980B tranny? I went through the whole parts list and the only difference was the case that I could see. I've found a NOS rebuilt one for a 42h for cheap and would like to know what I would have to do to use it. Thanks again Randy
Click to expand...

Randy, get a parts book for each machine, what you need is the "Barrel" Clutch packs and planetaries. It's a big job checking them out but if you find the same parts buy it and use the insides? New Old Stock is okay but Don't touch Surplus Stock. Surplus Stock roughly translated. Means NFG, been returned for warranty and not worth making right, foist off to unaware buyer. Been there felt that.
Later Bob
 
H

hector gemme

Well-Known Member
Joined
Mar 5, 2008
Messages
133
Location
Ste-Julie
Yes the transmission was BARREL altogether and attached the transfert case and weight 2300lbs and all parts are on rack and have some parts # in book
 
B

Bob/Ont

Senior Member
Joined
Sep 18, 2012
Messages
1,605
Location
Ontario
oarwhat said:
Hey Bob That's interesting. Do you know the difference from a 980 42H and a 89P 980B tranny? I went through the whole parts list and the only difference was the case that I could see. I've found a NOS rebuilt one for a 42h for cheap and would like to know what I would have to do to use it. Thanks again Randy
Click to expand...
Randy you might be better to take yours apart and see if Hector has the parts you need. Just a clutch pack and seals for sure and I would recommend the #4 clutch housing perchance it's got the same problem as the old one I encountered. I can't tell you how to check your housing. If you use your old clutch housing make sure the machine runs free while coasting in any gear. Any dragging pull it back out and change the housing.
Later Bob
 
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