80 series tcase difference and spring question/idea?

[mud4b]

ok i went to order a t-case rebuild kit for my 90 model 80 series, full time , 5 speed turbo diesel but i cant get one as there are 3 different types.

i need to know what this is please...

#1 part time t-case, (its not this one)
#2 full time non viscous
#3 full time viscous coupling.

how do i tell what this is and if mine has it? i get the feeling number 3 could be for a auto 80 series and not a manual?


also for my springs, i want to go 4" but nearly every 80 ive seen (no matter what the lift) has 30mm packers in the front to even it out. could i just buy 5" springs for the front and 4" springs for the rear... would this work?

cheers mark

[udm]

im pretty sure the first couple years they were all non viscous... atleast the manual versions.

[udm]

re springs, if you have a steel bullbar/winch and nothing at the back, you will probably need a front spring atleast 1" longer than the back spring.

[80's_delirious]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

[Tapage]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

Ditto ..

PArt times are HF1A and the viscous ones are HF2AV

Did you have the CDL dash button .. ?

[mud4b]

re springs, if you have a steel bullbar/winch and nothing at the back, you will probably need a front spring atleast 1" longer than the back spring.

yeah that is the setup i have now, but eventually i will be putting on a rear bar.

[mud4b]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

cheers bud it helps a ton...

[mud4b]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

Ditto ..

PArt times are HF1A and the viscous ones are HF2AV

Did you have the CDL dash button .. ?

hmmm totally opposite to the above.. i do have the cdl switch also.

[dow50r]

Gday
if you have ABS you have viscous, and no dash switch for locking the diff, unless someone else has put one in...the viscous case has a shorter rear tailshaft due to the viscous bit making the transfers ass longer...
any diesel needs the heavier front springs, ie ome 850...as they are heavier up front. so if thesame manufacturer sells both 4 and 5...then you should be able to do as you suggest...

[80's_delirious]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

Ditto ..

PArt times are HF1A and the viscous ones are HF2AV

Did you have the CDL dash button .. ?

hmmm totally opposite to the above.. i do have the cdl switch also.

Hey mud4b,

Tapage refers to HF2A V V being for viscous.

HF2A is reference for full time-no viscous

My truck is same year model as yours, I have a Toyota factory repair manual covering 1990 FJ80, HZJ80 and HDJ80, and there is no reference to a viscous coupling for any of the transfers. Also no reference to ABS brakes, I dont think they were commonly availabel on any car until later than 1990.

I would pretty much guarantee yours has no viscous coupling.

Dave.[/b]

[mud4b]

Gday
if you have ABS you have viscous, and no dash switch for locking the diff, unless someone else has put one in...the viscous case has a shorter rear tailshaft due to the viscous bit making the transfers ass longer...
any diesel needs the heavier front springs, ie ome 850...as they are heavier up front. so if thesame manufacturer sells both 4 and 5...then you should be able to do as you suggest...

sweet i do not have abs and i do have the cdl switch.

im going tough dog coils so hopefully they will have both and not the normal 3- 5 then 5-6... i hate that...

cheers mark

[mud4b]

Hey mud4b

toyota workshop manual has transfer for your truck listed as HF2A with no viscous coupling

hope this helps

Ditto ..

PArt times are HF1A and the viscous ones are HF2AV

Did you have the CDL dash button .. ?

hmmm totally opposite to the above.. i do have the cdl switch also.

Hey mud4b,

Tapage refers to HF2A V V being for viscous.

HF2A is reference for full time-no viscous

My truck is same year model as yours, I have a Toyota factory repair manual covering 1990 FJ80, HZJ80 and HDJ80, and there is no reference to a viscous coupling for any of the transfers. Also no reference to ABS brakes, I dont think they were commonly availabel on any car until later than 1990.

I would pretty much guarantee yours has no viscous coupling.

Dave.[/b]

i did see that after i replied, cheers for confirming it...
cheers mark.

[Tapage]

I dont think they were commonly availabel on any car until later than 1990.

Ditto

Here in Panama the viscous t-case HF2AV start from 97 up to 98 ( only 1 year and a half aprox ) and inmediately switch to 100 series course with visco one ..

In USA the HF2AV start from 95 up to 97 ..