C6 to 5-speed conversion

[RTM]

I have the bronco listed for sale and I hope to sell it. If I can't sell her I have been thinking of installing a 5-speed transmission in place of the C-6. I want an over drive.

I do know the ZF would be better than the Mazda version but it's a little harder to find. Has anyone done this conversion and if so what was involved? My guees is it will be a straight forward swap but I don't have much experience with Later Model trucks. If you did do the swap where you happy with it? thanks bob

[Traveler]

Of course the bell housings would be different, but here are some links to good info.
And myself, I wouldn't be afraid of the Mazda, if you know you got a new one, or close to it.

ZF conversion HERE
and HERE
and HERE

Give you a good start maybe.

[RTM]

Thanks, that will help get me started. I have found a few ZF trannies for 650 and up. One isn't far from me but it has no transfer case and I am not sure if my case will bolt up or not.

If the truck doesn't sell I will be installing a ZF by xmas.

[Traveler]

Not sure what transfer case you have, most ZF would be in front of a 1356, not sure, but if the ZF came from a 4x4 it should bolt in.

[RTM]

It looks like a 1356 case.

[Traveler]

Guys on the Full size bronco site would know,maybe one will chime in, I was thinking 1/2 tons had 1325, or 1346, or something a little different.
Maybe the dimensions are the same, but the number was different.

[RTM]

The person I had talked to at a junk yard over the phone said all F150 transfer cases would bolt up to the ZF but a bronco transfer case would not. ?She gave a year for the F150 transfer case and I can not recall what years it was. ?I do know that if I have an F150 case I would be fine. ?The tag appears to have been removed from my case so I am trying to ID it from a picture.

So here is where I get lost. ?I don't know if they made centurions from F150 or bronco trucks? ?I don't even know what to buy parts for yet.

I am starting to like the auto trans and I am having second thoughts about a 5 speed. ?I am thinking of changing the gears to bring the rpm's down a bit. ?What do you think? ?I like the C-6 because it's stronger than an AOD. ?I hear bad things about the AOD tarnsmissions.

I am reaaly starting to like this truck. ?I may keep it. ?It's growing on me and I think the wife likes it as well. ?We will take our first long road trip in it today. ?Gas mileage will suck compared to the explorer but I think the room inside the centurion will offset the mileage issue.

I found this: ?'87 and newer Ford full size Broncos. Special CV U-joint drive shaft required, 1356 case. There are two different 1356 cases. One with a slip yoke and one with out.

http://www.ericsrv.com/images/GearVe...tionguide.html

[Traveler]

Okay, I know what they are talking about now.
Look under the truck. If it has a fixed yoke, meaning a nut holds the yoke on the back of the transfercase then it is a bronco case.
If it is a slip yoke, where the shaft will pull right off the splines then it is a F150 case.

Either way the input is the same and you should be able to slide your case on the ZF.

I am sure she just looked at part numbers and saw the number was different for the bronco, and F150.

[RTM]

I have the bolt on style yoke.

[RTM]

Travler, I found a small block 4X4 zf today for $100 with out the transfer case. I will pick it up on Monday. It's missing the shifter but I am sure I can dig one up from some where.

[bob]

my 88 f250 with 5 speed manual (i am sure its zf) has bw 13-45. 13-45 has a 1and 3/16 inch filler and drain plug. the 13-65 in my 92 c150 has the small square hole for a rachet.

Bob

[RTM]

Let me take a guess at this. The 13-45 is the stronger transfer case?

[bob]

i would not say ether way. it seams from 87 til 91 you could get ether one, 92-96 you got all 13-56. this info is out of chilton. I also dont see a 13-45 with electric shift, may have some thing to do with it, just my guess.

Bob

[RTM]

It appears my case has a spot where the electric shift would bolt up? I will be repalceing the rear fuel pump today so I will look for the drain plug size.