NP271F transfer case differences
Cargo Master
Joined: Apr 2022
Posts: 3,196
Likes: 1,698
Is this upgrade the updated shaft and fork or soemthing else?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
That's my GUESS. Mine came from the factory without an oil galley for the shift fork, but with other oil galleys. New kit had an extra oiling galley for the small shift fork.
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Tuned
Joined: Oct 2020
Posts: 467
Likes: 158
Thanks fellas.
Found these guys in my search. Came recommend from an auto mechanic friend of mine. Super-super helpful dude for sure he knew all about these cases and the range fork issues. Hooked me up with the parts I need I’ll just go that route and redo mine.
https://www.idahotrans.com
I gotta wonder how many rigs are still on the road with the old splash oiled range forks. Not that I don’t want to upgrade just curious is all.
Found these guys in my search. Came recommend from an auto mechanic friend of mine. Super-super helpful dude for sure he knew all about these cases and the range fork issues. Hooked me up with the parts I need I’ll just go that route and redo mine.
https://www.idahotrans.com
I gotta wonder how many rigs are still on the road with the old splash oiled range forks. Not that I don’t want to upgrade just curious is all.
Logistics Pro
Joined: May 2017
Posts: 3,523
Likes: 483
From: Southern OH
Still trying to figure out the best option moving forward. This might be the ticket to upgrade my early case (splash oil) to pressurized oil like the later more reliable cases?
https://shop.broncograveyard.com/mob...ctinfo/716210/
Sounds like I can use some of the internals from a NP273F and gain a synchros…. Might be an option too.
Thanks for following along,
Andrew
https://shop.broncograveyard.com/mob...ctinfo/716210/
Sounds like I can use some of the internals from a NP273F and gain a synchros…. Might be an option too.
Thanks for following along,
Andrew
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Tuned
Joined: Oct 2020
Posts: 467
Likes: 158
That makes sense good to know thanks.
Well I got the transfer case all put back together just need to install it—sweet! Not a hard job at all but it’s times like these where you put a pair of snap ring pliers to the test lol.
Mercon V? I was gonna fill it, run it then dump it after a handful of miles just to be safe.
Thanks again fellas,
Well I got the transfer case all put back together just need to install it—sweet! Not a hard job at all but it’s times like these where you put a pair of snap ring pliers to the test lol.
Mercon V? I was gonna fill it, run it then dump it after a handful of miles just to be safe.
Thanks again fellas,
Logistics Pro
Joined: May 2017
Posts: 3,523
Likes: 483
From: Southern OH
That makes sense good to know thanks.
Well I got the transfer case all put back together just need to install it—sweet! Not a hard job at all but it’s times like these where you put a pair of snap ring pliers to the test lol.
Mercon V? I was gonna fill it, run it then dump it after a handful of miles just to be safe.
Thanks again fellas,
Well I got the transfer case all put back together just need to install it—sweet! Not a hard job at all but it’s times like these where you put a pair of snap ring pliers to the test lol.
Mercon V? I was gonna fill it, run it then dump it after a handful of miles just to be safe.
Thanks again fellas,
Cargo Master
Joined: Apr 2022
Posts: 3,196
Likes: 1,698
It has a pickup from the pump down to bottom of case near drain plug. So it sucks fluid up from there. If its a manual tcase just put t case in neutral and let it idle in gear and it should prime it up pretty quick. Otherwise just drive around slowly for couple minutes and it will be fine.
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Logistics Pro
Joined: May 2017
Posts: 3,523
Likes: 483
From: Southern OH
It has a pickup from the pump down to bottom of case near drain plug. So it sucks fluid up from there. If its a manual tcase just put t case in neutral and let it idle in gear and it should prime it up pretty quick. Otherwise just drive around slowly for couple minutes and it will be fine.
Cargo Master
Joined: Apr 2022
Posts: 3,196
Likes: 1,698
I couldn't remember if it was driven by input or output. It's been a while since I've had one apart. Either way just take it easy on it few miles and it will be fine.
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Tuned
Joined: Oct 2020
Posts: 467
Likes: 158
I would not attempt it without a heavy duty pair of snap ring pliers for sure haha.
Truth be told I think I was just on borrowed time. Transfer case was likely original to the 250k mile truck. Sure the updated components are likely better but I think there’s a million of the non-updated cases out there on the road kicking butt. I don’t know if I’d worry about it too much.
I would however recommend everyone get under there and check the six mounting bolts and make sure they’re tight! I think there should be dowel pins between the trans and t-case from the factory but there’s not..
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