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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: csdineley on March 25, 2013, 11:16:46 am

Title: 14bsf to 14bff swap?
Post by: csdineley on March 25, 2013, 11:16:46 am

Hello

I wondering how hard would it be to swap a 14bff into my truck with a 14bsf?

Title: Re: 14bsf to 14bff swap?
Post by: Captkaos on March 25, 2013, 01:11:34 pm

If it is an early model regular cab it will bolt right in.  What is the donor?

Title: Re: 14bsf to 14bff swap?
Post by: csdineley on March 25, 2013, 01:18:39 pm

1986 GMC 1-ton srw. Everything looks like it would bolt up but the shock mounts.

Title: Re: 14bsf to 14bff swap?
Post by: Blazin on March 25, 2013, 02:12:10 pm

It will bolt in. Shock mounts might need to be modified, or swapped from the semi floater. U joint might have to have a combonation joint.

Title: Re: 14bsf to 14bff swap?
Post by: pholliday1 on March 25, 2013, 03:32:03 pm

That's a huge upgrade you'll be glad you did.

Title: Re: 14bsf to 14bff swap?
Post by: Engineer on March 25, 2013, 10:26:13 pm

NO!

If the 14-bolt FF is out of a 1-ton the spring seats are narrower than your 3/4-ton. You need to find a 14-bolt FF from a 3/4-ton, or be prepared to cut and reweld the new axle's spring seats.