Marlin Crawler T-Case gears and V6 T-case

Bill · 04-09-2006, 05:07 PM

I've been reading up on Marlin Crawler t-case gears, both the 4.70 gear sets, as well as the dual t-case set ups they offer. (ok, ok, dreaming and drooling)

However, the instal instructions are for gear driven t-cases, and for dual set-ups they say you need to use a gear driven t-case. But made no mention on use of chain drivens.

So does anyone know if you can use the same gear set with a chain driven t-case as with the gear driven cases? Or if I'd need to replace my existing case in order to get a lower crawl ratio?

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Cebby · 04-09-2006, 05:40 PM

Silly question, do you have a 5 speed or manual?

**DeathCougar** · 04-09-2006, 05:59 PM

5speed is a manual....i think you meant Automatic or Manual lol

Cebby · 04-09-2006, 06:10 PM

Quote:

Originally Posted by DeathCougar

5speed is a manual....i think you meant Automatic or Manual lol

Duh...ooops!

AH64ID · 04-09-2006, 06:33 PM

Quote:

Originally Posted by DeathCougar

5speed is a manual....i think you meant Automatic or Manual lol

Thats why is was a silly question

The reason you only see gear driven is because thats all you can do. The gear driven case is stronger, but not used in V6's, or 4cyl runner 90-95 since it is not shift-on-the-flyabe...Marlin makes everything you need to run a gear drive behind your v6 tranny.

JackKnife · 04-09-2006, 08:41 PM

You can only throw away the chain-driven cases. they use a planetary gear system. Marlins gears won't work with these.

Bobakazi · 04-09-2006, 11:18 PM

Quote:

Originally Posted by Cebby

Silly question, do you have a 5 speed or manual?

Cebby,
Respect.

That was really funny though. I think you saved yourself by saying it was a silly question.

kyle_22r · 04-10-2006, 12:09 AM

Quote:

Originally Posted by 4x4nala

Thats why is was a silly question

The reason you only see gear driven is because thats all you can do. The gear driven case is stronger, but not used in V6's, or 4cyl runner 90-95 since it is not shift-on-the-flyabe...Marlin makes everything you need to run a gear drive behind your v6 tranny.

the geardrive case is most certainly shiftable on the fly, provided your hubs are locked. it just doesn't have a synchro like the chain drive case.

you can adapt the gear driven case to your V6 tranny with an adapter plate and 23 spline input gear.

Cebby · 04-10-2006, 06:54 AM

Quote:

Originally Posted by Bobakazi

Cebby,
Respect.

That was really funny though. I think you saved yourself by saying it was a silly question.

That was a test. You all passed.

abalagtas · 04-10-2006, 08:29 AM

There was talk on Marlin's board for a while about a chain case adapter, but it ended up being vaporware. I don't think they had the cycles to test it, but there was a lot of interest. All-in-all I don't think there was a lot of cost saving going that route.

AH64ID · 04-10-2006, 08:40 AM

Quote:

Originally Posted by kyle_22r

the geardrive case is most certainly shiftable on the fly, provided your hubs are locked. it just doesn't have a synchro like the chain drive case.

True, but I was going off the synchro vs non-synchro deff...

Are there trucks with ADD and Gear Drive, becuase they would have no way to shift unless stopped...

snap-on · 04-10-2006, 09:32 AM

Quote:

Originally Posted by kyle_22r

you can adapt the gear driven case to your V6 tranny with an adapter plate and 23 spline input gear.

so all you have to do is aquire 2 stock gear driven cases, and the lower gears, and the adater plate and diffrent input gear.

all of which will set you back a small fortune!

if you have a v6 truck and want super low gears like the "cool" rock guys, buy 1st gen with 22re and go from there... then its only $600-800 for dual cases with one set of lower gears...

see http://www.marlincrawler.com/htm/tra...ickup_dual.htm for all the drewling - eye poping goodness

Bill · 04-10-2006, 12:43 PM

I've got a 5-speed...and a manual.

Where would I be able to find a t-case adapter and new input shaft? There seem to be 1st Gen's popping up every so often in the Junk yards here, so the t-case wouldn't be too too hard to find.

Two questions about going to a gear driven t-case though: 1: would using the adapter mean that it's going to be longer and therefore need a new driveshaft. 2: are (most) 1st Gen t-case top or forward shift? and what would need to be done to go from my current top-shift to a forward shift...if need be.

kyle_22r · 04-10-2006, 09:53 PM

i think the adapter is under an inch thick -- your slip yokes will make up that difference.

in the grand scheme of things, i'm pretty sure most cases were forward shift. ALL '79-83 cases were top shift, and other that that, only '85-88 EFI trucks had top shift cases. you can convert forward shift cases over, but the kit is about $80 from marlin. i can pick up top shift cases for that much all the time if i look.

**DeathCougar** · 04-10-2006, 09:58 PM

Quote:

Originally Posted by Bill

I've got a 5-speed...and a manual.

Where would I be able to find a t-case adapter and new input shaft? There seem to be 1st Gen's popping up every so often in the Junk yards here, so the t-case wouldn't be too too hard to find.

Two questions about going to a gear driven t-case though: 1: would using the adapter mean that it's going to be longer and therefore need a new driveshaft. 2: are (most) 1st Gen t-case top or forward shift? and what would need to be done to go from my current top-shift to a forward shift...if need be.

The adapter is avail through all pro, marlin crawler, inchworm, advanced adapters, and a few others.

1. Yes adding an adapter will make the setup longer, and your drivelines will have to be moddified.

2. Depends on EFI or Carb (W or G series) transmissions. W series are top shift cases, G series are forward shift (w=EFI g=Carb)

You dont want a forward shift case, you want a top shift case if you are looking at dual cases.

Also, i believe turbo transfer cases are forward shift? I had to have mine converted to top shift when I did my dual cases. Forward shift cases dont work, becuase the middle case in a dual case setup only shifts high and low....no 4x4. the 4x4 part is left to the second case, which also needs to be top shift.

04-09-2006, 05:40 PM	#2 (permalink)
Cebby Contributing Member Join Date: Sep 2002 Location: Pittsburgh, PA Posts: 11,246	Silly question, do you have a 5 speed or manual? __________________ UZswap.com A site dedicated to sharing info for swapping the Toyota/ Lexus UZ (V8) engines into Toyota Trucks and 4Runners. My 4Runner 1993 4Runner, 1UZ (V8) auto dual ultimate crawler, double locked, 35's on beadlocked SR5 alloys, low lift, hacked fenders, tubbed firewall, custom armor TOOLandFAB.com A discussion forum dedicated to tools, fabrication & workshops. See my JD2 Bender Hydro Conversion BUY THIS 2008 CALENDAR

04-10-2006, 08:29 AM	#10 (permalink)
abalagtas Registered User Join Date: Jul 2003 Location: Chula Vista,CA Posts: 193	There was talk on Marlin's board for a while about a chain case adapter, but it ended up being vaporware. I don't think they had the cycles to test it, but there was a lot of interest. All-in-all I don't think there was a lot of cost saving going that route. __________________ Semper Fi, Alfred '91 4Runner SR5 4wd 3.0 V6 '10 Scion Xb

04-10-2006, 12:43 PM	#13 (permalink)
Bill Registered User Join Date: Jul 2005 Location: Calgary, AB, Can Posts: 690	I've got a 5-speed...and a manual. Where would I be able to find a t-case adapter and new input shaft? There seem to be 1st Gen's popping up every so often in the Junk yards here, so the t-case wouldn't be too too hard to find. Two questions about going to a gear driven t-case though: 1: would using the adapter mean that it's going to be longer and therefore need a new driveshaft. 2: are (most) 1st Gen t-case top or forward shift? and what would need to be done to go from my current top-shift to a forward shift...if need be. __________________ 86 Turbo Pickup EB Street RV head EB 268 Cam V6 Brakes + MC A340F auto ---> W56 5-spd swap ...I want a bigger turbo...

04-10-2006, 09:53 PM	#14 (permalink)
kyle_22r Registered User Join Date: Mar 2003 Location: Lacey, WA Posts: 3,992	i think the adapter is under an inch thick -- your slip yokes will make up that difference. in the grand scheme of things, i'm pretty sure most cases were forward shift. ALL '79-83 cases were top shift, and other that that, only '85-88 EFI trucks had top shift cases. you can convert forward shift cases over, but the kit is about $80 from marlin. i can pick up top shift cases for that much all the time if i look. __________________ 1998 tacoma, 3RZ-FE, 5 speed, 30x9.5R15 M/Ts past toys: 1984 4x2 1979 4x4 1991 4x4

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04-09-2006, 08:41 PM	#6 (permalink)
JackKnife Registered User Join Date: Dec 2005 Location: Phoenix, AZ Posts: 148	You can only throw away the chain-driven cases. they use a planetary gear system. Marlins gears won't work with these.

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