Dana 18 questions

I did a little damage to my gears awhile back. A member here has some gears from his case that he doesnt need anymore. My question is if he has the whole set including bull gear will they fit my my case even thought they are a different tooth count than what I had? Does it matter if they came from a big bore vs. small bore transfer case. Any help would be appreciated. Thanks

 

I can't see why not...big bore vs small bore shouldn't matter unless they are different intermediate shaft diameters. Your tranny will determine if the drive gear works (6 spline-i.e. T90 vs 10 spline-i.e. T14).

 

Mine is a 6 spline just like his. But I guess it is time for me to do more research on this before I buy them. Just thought for sure someone here would know. thanks

 

If yours has a 1 1/4" intermmediate gear, it would be set up for a 29tooth bull gear. A 1 1/8" would be set up for 26 tooth gears.

 

Unless yours was a WWII case, they will fit. The ID of the intermediate gear is the same for both 1 1/4" and 1 1/8" The bearing make up the difference. (It may even be the same for WWII cases, but I've never seen one of those.)

 

Mine is a militery case. Thats what they told me when I was looking for the pivot rod for the twin stick shifters. the seller told me his has the same diameter intermediate shaft as mine, so is there any other differences. He is includung the bull gear from the transmission, so it is a complete gear set. Anyone know of any show stoppers with this gear swap?

 

Military as in M38/M38A1 or military as in MB/GPW?

 

I dont know. I know when I told the guy I had a shifter bolt with a threaded portion only by the head, and the rest of the bolt was a smooth shaft then he told me it was a military transfer case. No other specifics, man this is frustrating. I just want to know for sure if they will fit before ordering them.

 

Well, as far as I know, they will fit. Only exception I know of is the WWII cases (MB and GPW which had 3/4" shafts.) I've never heard of another exception for other military cases. Here's a list gear sets showing what works with what intermediate shaft. It doesn't make any mention of military vs. non military cases.

 

if ya only need a case i would go with a spicer 20 case and 18 guts!!

just my $0.02

 

No I have a complete 20, Just the offset rear diff kinda ruins that. i am keeping it till I find a centered rear diff. But for mow I need my dana 18 back together. I think I have everything worked out . I have a guy that I have purchased the right intermediate gear from locally.