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1lt T'Fer Case into 98 Sierra
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Author:  Rusho [ Wed Aug 12, 2009 1:28 am ]
Post subject:  1lt T'Fer Case into 98 Sierra

Hi All,

Can a 1lt T'fer case be used in a 98 sierra??? Wanting some better low range gearing. Any ideas?

Thanks

Adrian

Author:  shep [ Wed Aug 12, 2009 1:43 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

i think they fit but you need a leafie jack shaft, i could be wrong but.

Author:  Rusho [ Wed Aug 12, 2009 1:46 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

Thanks Shep

Author:  unique_seek [ Wed Aug 12, 2009 1:55 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

pritty sure they fit,but you have to get one with a 4wd switch,and you have to change the flanges,as the 1l ones dontmatch up to the coily ones...also you may have to change the handbrake setup(1l have drum brake on the t/case for handbrake.)

Anyone feel free to correct me if im wrong? :P

Author:  shep [ Wed Aug 12, 2009 1:58 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

unique_seek wrote:
pritty sure they fit,but you have to get one with a 4wd switch,and you have to change the flanges,as the 1l ones dontmatch up to the coily ones...also you may have to change the handbrake setup(1l have drum brake on the t/case for handbrake.)

Anyone feel free to correct me if im wrong? :P


oh yea i forgot about that stuff. :lol:

Author:  Gwagensteve [ Wed Aug 12, 2009 2:17 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

Mr unique_seek is on the money.

Also, the front driveshaft ends up a bit too long (the coil case is shorter front to back than a gear drive sierra case)

Might be OK, but on the car I did eleventy years ago I recall we put a leaf front driveshaft in it.

Steve.

Author:  xedent [ Wed Aug 12, 2009 2:50 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

You don't have to use the handbrake drum, when i changed mine i just changed the rear flanges over as well and used my normal rear drums as the handbrake. Might be different on a coily but.

Author:  Rusho [ Wed Aug 12, 2009 10:20 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

Hi All,

Thanks very much for the info, I am going to try the 1Lt case with the front shaft from a leafy and use existing handbrake from rear drums. Hopefully works out ok.

Author:  16ZUK [ Wed Aug 12, 2009 12:13 pm ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

hey adrian if you need a leaf front drive shaft i'll swap one for the coilly one you got from me last night. cheers Jeff

Author:  Rusho [ Wed Aug 12, 2009 12:26 pm ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

Thanks jeff, cheers again for your help last night also.

Author:  unique_seek [ Wed Aug 12, 2009 10:03 pm ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

f you run the fron leafy shaft..wont you have to change the front diff flange too?or at least get the shaft moded?

Ps let us know how you go as I will be doing this mod in the near future :lol: maybe some picks??hehe

Author:  Saam [ Thu Aug 13, 2009 2:25 am ]
Post subject:  Re: 1lt T'Fer Case into 98 Sierra

WT flanges are the same as coily, coily are just threaded, so you can use the coily bolts to bolt on the wt flange

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