Topic: 3rd case or gears? Opinions wanted please

[Gittinit]

Opinions wanted

Is there any reason I shouldn't get a 3rd case/clocked adapter instead of crawler gears for my toy. I am considering adding a 3rd case.

3rd case

pros:
double low 2wd without twinstick
2pice front shaft for better drivline belly clearance
flatter belly at breakover angle

cons:
rework floor for new case
rework rear shaft
install 2 pice front shaft




Gears insted of 3rd case

Pros:
less work, no changes other than internal case mods



cons:
2wd double low requires twin stick

[79coyotefrg]

i vote  3rd case AND  twin stick 

[superyota]

i'd go with gears.  better if you ever plan on driving it on the road too.  a two piece front seems a little scetchy.  i'd be afraid of reaking it. 

[MiniSimp]

3rd case:

Pros:
Equal length driveshafts
More options
No case grinding
20* clocking with 2 MC-R10 adapters
248:1 crawl ratio with W56/RF1A/RF1A/RF1A/5.29's
Option to have 2169:1 with 4.7's in all three cases

Cons:
Change crossmember and rear mounting point may interfeer with horse collar crossmember and gas tank
Drivetrain will be around 53" long from bell to flange
Rear case shifter will be by seatbelt mounts
will have to buy a twin stick anyways for the 1st/low/low/low/2wd option
Change both driveshaft length
Not as easy as installing just gears

[Rockcrawlintoy]

just wondering why you need double low 2wd?

[MiniSimp]

just wondering why you need double low 2wd?

Helps on granite when turning.

[superyota]

Helps on granite when turning.

 

[superyota]

i guess it would be cool if you had a rear driveline disconnect and needed the low to the front.

[79coyotefrg]

i'd go with gears.  better if you ever plan on driving it on the road too.  a two piece front seems a little scetchy.  i'd be afraid of reaking it. 

trust me,  if Gittinit  builds it  it will work

[TIMS89CRAWLER]

I like the 3 case idea myself I have been thinking about doing it myself

[Gittinit [OP]]

just wondering why you need double low 2wd?

I run a welded rear. It would help when turning to have 2wd double low.

trust me,  if Gittinit  builds it  it will work

Yup i aint scarred! I may model it simmular to 4rnrricks desighn. I want to upgrade to 39.5s later so some more gearing will be needed to keep the gearing simular to what I have now. Oh and my rig only gets driven about 5 miles to and from local wheeling spots, otherwise it gets hualed on the crawler hauler.

[Gittinit [OP]]

i guess it would be cool if you had a rear driveline disconnect and needed the low to the front.

sounds like a cool idea....I might need a air cylinder or a remote lever with linkage to engage/disengage a rear disconnect with 3 cases. HMMMMM 

[Gittinit [OP]]

3rd case:

Pros:
Equal length driveshafts
More options
No case grinding
20* clocking with 2 MC-R10 adapters
248:1 crawl ratio with W56/RF1A/RF1A/RF1A/5.29's
Option to have 2169:1 with 4.7's in all three cases

Cons:
Change crossmember and rear mounting point may interfeer with horse collar crossmember and gas tank
Drivetrain will be around 53" long from bell to flange
Rear case shifter will be by seatbelt mounts
will have to buy a twin stick anyways for the 1st/low/low/low/2wd option
Change both driveshaft length
Not as easy as installing just gears

I already modded the horsecolar crosmember when I raised my cases, I may have to remove it completly with 3 cases. Oh the gas tank is already relocated too. changing the tcase mounting may be a pro, becouse I can get a completly flat botton this time.

[NorCalToy]

then do it and go for the 2169:1 low

[REG535]

ok maybe am just  but why would you need a two piece driveshaft for it to work?
doesnt marlins truck have 3 t-cases? i didnt know you had to have a two piece driveshaft..

[Rockcrawlintoy]

ok maybe am just  but why would you need a two piece driveshaft for it to work?
doesnt marlins truck have 3 t-cases? i didnt know you had to have a two piece driveshaft..

you dont have to. but it keeps it up and out of the way

[Gittinit [OP]]

then do it and go for the 2169:1 low

That would require gears and another doubler. I think 3 cases all stock gears(for now) or just the doubler with gears in the rear case is all I could swing for now.

[KDXSR5]

I wouldn't do 3 cases, too many levers and such for my tastes. I would just do gears.

[blackdiamond]

Three cases is  given the option of 4.70 gears in the rear case.  Your gearing options are essentially the same.

2.28, 4.70 & 10.72 vs. 2.28, 5.20 & 11.85 which isn't enough difference for the added work.

Would it really save you any money?

[All_Set]

Start a price sheet.  Should be interesting.  


would you twin stick the 3rd case?

[tom w.]

Three cases is  given the option of 4.70 gears in the rear case.  Your gearing options are essentially the same.

2.28, 4.70 & 10.72 vs. 2.28, 5.20 & 11.85 which isn't enough difference for the added work.

It's a difference of about 23:1.

It just depends on if you would rather put the extra work into a 3rd case, or maybe spend a little more money for gears and a twin-stick.

[YotaJosh]

I vote crawler gears and twin stick the case while you have it out. Three cases would be cool, but sounds like more work. Less work to get it going = more wheeling. 

[bigarms23]

go with gears but i have had 3tcase with 4.7s in all 3 cases and the 3rd shifter comes up by the end of the seat. course it was fun to have a 2828 crawl ratio

[Gittinit [OP]]

Start a price sheet.  Should be interesting.  


would you twin stick the 3rd case?

My price sheet wouldnt be realistic by most standards. I can fab new driveshafts for cost of some tube, heck I would probably be shortening both my shafts, after adding in the 2pice section from a parts truck. The only real cost would be the adapter, and bearing mount, or gears, and twinstick. Other than those items there would be minimal cost either way.

It's a difference of about 23:1.

It just depends on if you would rather put the extra work into a 3rd case, or maybe spend a little more money for gears and a twin-stick.

It would actually be more expensive to buy the mc07r10, and the hendrix bearing mount, than it would for me to get gears for my rear case, but the twin stick make this option more $.




I guess what I was wanting to hear is......
Will running tripple cases make my drivetrain more prone to input/ output falier than just adding gears to my doubler?

 The work isnt an issue for me. I enjoy building as much as wheeling, and I generally look for an excuse to change something on my rig.

I think I like the idea of tripples better than the regear alternative becouse I can finally achive my goals of flatbelly, and increase my clearance at the driveshafts as well. I just don't want to create any other weak links either way.

[blackdiamond]

Your third case input shaft would have more torque on it than putting 4.70 gears in the front case of a dual setup.  You would need a 23 spline I think.

[boggerunner]

i ran 3 cases in my 79, it worked great, and all were 21 spline, never broke anything, and i was really really hard on it.  The shifters made a great arm rest too.

[boggerunner]

i also ran a square front driveshaft, it weighed alot, and didnt hang down too far with my flatbelly.

[Gittinit [OP]]

i ran 3 cases in my 79, it worked great, and all were 21 spline, never broke anything, and i was really really hard on it.  The shifters made a great arm rest too.

I was hoping you would chime in. Your one of the few I know of on this forum who isnt scared to run 3, 21 spline cases.

I wonder why your not still running this setup now?

Your third case input shaft would have more torque on it than putting 4.70 gears in the front case of a dual setup.  You would need a 23 spline I think.

Hmmm thats a good piont. I wonder how many people who run low gears in the crawlbox, have broke 21 spline output/input shafts. Didn't Big Mike do some research on this rescently? I'm gonna have to find that thread he started.

[79coyotefrg]

i vote  3rd case AND  twin stick 

ok i added a poll 

[79coyotefrg]

I was hoping you would chime in. Your one of the few I know of on this forum who isnt scared to run 3, 21 spline cases.

I wonder why your not still running this setup now?
 
Hmmm thats a good piont. I wonder how many people who run low gears in the crawlbox, have broke 21 spline output/input shafts. Didn't Big Mike do some research on this rescently? I'm gonna have to find that thread he started.

get a  case from a L43  it  doesnt have the "fuse"  part in the input  and  is  21 spline