I own a 94 Geo Tracker with the 8v and a 5 speed. Last night I think it slipped a bearing. I have a 95 Geo Tracker with an auto trans as a parts car which I am tearing apart right now. I am not a fan of the automatic transmission as a solution. I am a newbie when it comes to working on off-road vehicles. This is my first tracker and I have no experience with them. I had to order a repair manual since they didn't have one in stock at the good old A&A I was at. It'll be here soon but in the mean time I am dead in the water with the vehicle. However, I have done some engine swaps and am used to modifying things. So I have some questions.
Does anyone know if the block used in both cars is the same?
Has anyone tried to swap the 16v engine onto an 8v transmission?
Does anyone have any advice to assist me while I overcome this obstacle?
the trannys fit both motor ok.
in fact 95 had both motor sold. (92-95)
your 8v has high axles.
the 95 AT has low axles. (hotter motor will drive 8v tranny great) 5.12:1
the issues are;
16v motor to 8v car. JUST THE MOTOR , did you say. but you did say 1vv onto 8v tranny which really says 16v auto motor onto a 8v tranny.
the motor is fine, same crankshaft in fact.
motor has diff ,pistons and head..
harness is wrong, big time wrong.
dont try to put a 4sp in to any 5sp body, not fun. harness and TCM issues.
the 16v motor has wrong flywheel. and misc parts. ,
remove the flywheel from the 8v and it fits on the 16v motor, same pn.
replace the clutch. or at the least the 2 bearings. T.O. and Pilot.
you could swap short blocks too.
the compression will drop , i think, have links to folks who know. for sure.
the 16v pistons are notched, the 16 v head has smaller combustion chambers.
so the compresson will drop i think.
so you can run 80 octane mexican gas, hahahaha (not joking if you live near boarder, you dont.)
in SA they have 6 grades of gas, Paradise. love it.
drop compression enough and you can run Coleman fuel , ahahahaha
First I appreciate all the input on the topic. In a few days I will be tearing my 8v enging/trans out. Once I have the game plan for ecm usage and rewiring I'll be ready to begin the process. I read up a decent amount on the swap and it seems fairly common to use the 16v as an upgrade. Not many people touched base on going from auto-manual or manual-auto. I really do not want an automatic tranny. It would make me furious...
Have you, or any else completed a 16v engine (minus auto trans) onto an 8v manual trans? Or a 16v engine (minus 5spd) onto an 8v auto trans?
What ecm should I use?
If I go with the 16v ecm and rewire the plugs It shouldn't matter that I have no signal going to the trans since it's a manual correct?
Right now I had a cap go bad in the ECM of the 8v so I ended up wiring the fuel pump to a toggle switch and it hasn't lost much fuel efficiency or reliability. In fact since I band-aided that situation I put 3,000 miles on the car. The CEL has been on ever since but that is to be expected considering.
Now with that in mind couldn't the 8v ecm bypass the fuel controls in the same way?
resulting in it running slightly rich, but I could advance timing to overcome that obstacle when the time comes.
you need > (94/95 parts swaps is in correct family)
the ecu with the new motor.
the motor and dash harness sets.
the cross members. and all fiddly bits with it. and clutch cable mounts.
you are make a major , EFI electronics change. TBI to MPI !
for get the Auto and all its bs. if 4sp the bs expands to no end. TCM hell.
Quote:
Originally Posted by darksidegsx
First I appreciate all the input on the topic. In a few days I will be tearing my 8v enging/trans out. Once I have the game plan for ecm usage and rewiring I'll be ready to begin the process. I read up a decent amount on the swap and it seems fairly common to use the 16v as an upgrade. Not many people touched base on going from auto-manual or manual-auto. I really do not want an automatic tranny. It would make me furious... Swap fly wheels.
Have you, or any else completed a 16v engine (minus auto trans) onto an 8v manual trans? Or a 16v engine (minus 5spd) onto an 8v auto trans?
What ecm should I use? well the 16v ECU that comes with it. after all 1 injector driver can not drive 4.
If I go with the 16v ecm and rewire the plugs It shouldn't matter that I have no signal going to the trans since it's a manual correct?
Right now I had a cap go bad in the ECM of the 8v so I ended up wiring the fuel pump to a toggle switch and it hasn't lost much fuel efficiency or reliability. In fact since I band-aided that situation I put 3,000 miles on the car. The CEL has been on ever since but that is to be expected considering.
not really , ecu does not look at pump. all you did is circumvent crash safety, now we all know why those crash and burn videos in movies, look so cool , hahahahaha)
Now with that in mind couldn't the 8v ecm bypass the fuel controls in the same way?
you are a dreamer, sorry, but that is a no way JOSE'
TBI/and MPI are BLACK and WHITE. trying to cut a fat hog , huh?
resulting in it running slightly rich, but I could advance timing to overcome that obstacle when the time comes. I do not understand that but ,the FAT HOG is back, squealing like all heck.
Right or wrong?
cross members on car:
vary by 4wd/2wd and door counts. and tranny so what is your door count.
the mount parts are diff between AT and MT.
you need to take all the mount stuff with you , with motor and trans.
there are some mid year pn changes, at spec. VIN sn .
on the cross member itself .
the reason you dont see much on this topic is because
making a harness is 50 hours labor.
and swapping one is 5-10, depending on how done, and a ton of things.
like what tranny.
cruise control
Dash lamps and warnings.
backup lamp wiring.
and clutch swap.
, i never sawyour cars, but short block swap would do .
or take the 16v block and do a FLEEBAY overhaul with new pistons bearings, etc. in the kit. Hell bore it to the next over size and start new.
or run it with lower compression.
but the 16v has more power.
It's looking to be a long pain in the ass I can see.
Regretfully I may just end up doing a full 16v engine/trans/ecm swap.
Here's the full scoop on both cars
my 94 (8v) is a 5spd, 4x4(lock out), 2dr soft top. The ecm for this vehicle ends in b50.
my 95 (donor 16v) is an auto(not sure 3-4spd) 4x4(lock out), 2dr soft top. I am not sure about the ecm for this vehicle however, it has two entirely different plugs than the b50 ecm has.
I can't afford to do any engine rebuilding at this time. I just put almost 3k into align boring, honing, decking, balancing, and other things for my eclipse gsx. I have to repair this as cheaply (or for freely) as possible.
the TBI is MAP based Speed density system
the
MPI is Air density based (MAF) system. and Sequential too boot.
100% diff. night an day.
and the ECUs are like wise.
Early 16V is batch fired, there are slight differences in the wiring and the MAF is quite different. I would just swap everything apertaining to the injection and engine, including the loom.
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8v transmission w/ 16v engine
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