tigerboy rei i

I have no idea if this'll even work, but judging by similarities, I'm hoping. I'm trying to swap some S4 N/A motor and trans around. I've got an emaculate body that has a blown motor, mated to an automatic transmission and has cruise. The motor and trans I'm swapping doesn't have cruise and is manual, coming out of a base model.

Just a few questions before I rip everything apart. Is there a way to convert the cruise over onto the other motor? Woould I need to swap throttle bodies? Also, what would I need for the trans swap? Are the speedo cables backwards compatable? Would I need a speed calibration? The new body also has AAS. If I swap computers if necessary, will this cease to work? Do I have to swap the computers, or will the other one work? Any help would be great, thanks.

BlueTII

The cruise is just a matter of hooking up a vacuum line and the cable. If the bracket doesn't exist, then you just need to add the bracket.

Speedo cables are the same.

The AAS computer is in the rear of the car by the spare tire, I don't see how this is going to come into play with a motor swap.

The one big problem you are going to have is that the manual trans will not bolt to the Automatic chassis, you will either have to make custom brackets or weld on the mounts from a manual car. The driveshaft will have to be changed, and there will be some wiring to do to bypass the nuetral safety switch.

The Automatics also have a 3.90 rear end, the manual has a 4.10... this will cause your speedo to be off unless you swap the speedo gear assembly or the diff

tigerboy rei i

So, I have to cut off the auto trans mounts and put on the ones from my stick, eh? Seems simple enough, just some quick cutting and welding. What do you think is easier, cut and weld or fabaricating the brackets? If you were to do the trans swap, what do you think you'd charge?

Now, the 3.90 will make my speedo read low, right? So where's this gear assembly at? and is it easier to swap than the diff?

As for the cruise, that motor has some weird spring thing from the choke dashpot to one of the throttle plate rods, my other motor doesn't have that, will that be a problem with cruise?

Sindregutt

I bet you can find a manual bracket from a partscar/scrapyard. If you have a NA/T2 diff i would just swap it too. Pretty easy

Sindre

tigerboy rei i

I'm swapping out my good motor and trans from an 87 base into an 86 auto. I don't mind swapping the diff, just trying to keep as many seals and bearings as possible intact. My problem I guess is that the speedo on my current car doesn't work, I'm not sure if it's a broken cable or the gears. It sat for a LONG time (in excess of 5 years) without moving. Cables are cheap. Gear assemblies aren't. I don't even know where to begin thinking about finding one, and if it's a dealership part, well I'm going to leave it broken. I do have a tach .

tigerboy rei i

So, I noticed that the oil pressure guages seem different. The mark for 60 on my 87 is higher on the guage. Will it read where it does on my 87, or where it's supposed to? I'm not sure if there's some sort of control for the output to convert the OPS signal for the difference in guages.

Will a manual trans cradle bracket bolt in where the auto one goes? Or will I have to literally cut and weld everything in place?

Where is the speedo gear thing that I'd need to swap out instead of the diff? I'm going to get smaller profile tires on the stock rims for better sidewall stiffness for cornering, the 3.90
will actually help keep the speedo more accurate. I'm not sure the profile size yet, but when I find out, I can figure out how much speed I'll lose by them. Then I can find someone who's smart about diff gearing, and have them tell me if I had a speed of whatever after size calculations, how much faster I'd be with the 3.9 diff. Hopefully I can keep my gear cluster thing and just use the tire size to correct the speed difference from the diff! Good idea, no?

What is that spring thing on the choke control? And there's another thing I'm forgetting from the throttle, but I'm not sure what it is. Just that it was different.

I know someone can help me. When it happens, I will be most grateful. Thanks!