Ok guys. I remember a while back reading that with a 2000+ J-body 3400 swap, the gauges will work except for the fuel gauge. Someone discovered that if you reflash the pcm as a malibu, that it will work. I just cant remember which year. Please tell me
Thanx
Nevermind, found it, 03-04.
ok so wait a minute hows this work? im in the middle of the swap right now. (taking my time cuz the car is away for the winter) but i have a 95 cav with cluster from a 00+ z24..... will it work for me?
Not unless you rewired the whole car as 2000+.
I have discovered since this post that using a 2000 Impala pcm, all the gauges work, even the fuel.
yeah guys for some reason the chevy impala and malibu work the gauge, but not a grand am/ pontiac. Here is the problem that I was running into. Malibu's dont offer the 3.4 , and Impala's dont come with a 4t45e automatic. The impala flash works but the transmission slips. If you are deleting the auto stuff in the ecm the flash will work just fine. The other option would be to use the auto from the Impala, I think its a 4t65e and uses larger axles. I dont know what problems you run into getting axles to work so I didnt really mention that as an option.
ryan , if you have a pre 00 I dont think you have a fuel gauge problem. The newer gauges run through the engine computer and use different resistance in the sender, thats why there are guys trying to figure the gauge out.
01 cav w/01 3400 gam gt 4t45e
if you use the impala trans you will need to use both cav and impala axels and mate them together.would have to use the cavalier outers and impala inners as the splines are different.
95 your fuel guage will work just fine however your coolent temp and and tach i don't think work but since your 95 you might be able to get away with using an OBD1 computer. i don't know for sure so don't quote me on any of this i'm just tossing ideas out there for you
JBO since July 30, 2001
NOTa2_4 wrote:if you use the impala trans you will need to use both cav and impala axels and mate them together.would have to use the cavalier outers and impala inners as the splines are different.
95 your fuel guage will work just fine however your coolent temp and and tach i don't think work but since your 95 you might be able to get away with using an OBD1 computer. i don't know for sure so don't quote me on any of this i'm just tossing ideas out there for you
That's only if you want to retain the J-body spindles. If you change to 2000+ N-body spindles, you shouldn't have that problem.
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Whalesac wrote:NOTa2_4 wrote:if you use the impala trans you will need to use both cav and impala axels and mate them together.would have to use the cavalier outers and impala inners as the splines are different.
95 your fuel guage will work just fine however your coolent temp and and tach i don't think work but since your 95 you might be able to get away with using an OBD1 computer. i don't know for sure so don't quote me on any of this i'm just tossing ideas out there for you
That's only if you want to retain the J-body spindles. If you change to 2000+ N-body spindles, you shouldn't have that problem.
if you did as you mentioned wouldn't the axles be to long. being the impala is a wider car.
MRThompson (jrthompson) wrote:Whalesac wrote:NOTa2_4 wrote:if you use the impala trans you will need to use both cav and impala axels and mate them together.would have to use the cavalier outers and impala inners as the splines are different.
95 your fuel guage will work just fine however your coolent temp and and tach i don't think work but since your 95 you might be able to get away with using an OBD1 computer. i don't know for sure so don't quote me on any of this i'm just tossing ideas out there for you
That's only if you want to retain the J-body spindles. If you change to 2000+ N-body spindles, you shouldn't have that problem.
if you did as you mentioned wouldn't the axles be to long. being the impala is a wider car.
I'm almost positive Lenko used full stock W-body axles when he did his 3800 swap. Tom (Wrench Monkey) looked into this a while ago for the N-body/J-body hybrid axles and if I remember correctly, he found that stock for stock, the N-body and J-body axles are the same length, but combined the axles are actually a little bit longer (about 1/2"). That was for J trans to N spindles, so for the reverse (N trans to J spindles) the axles would actually be shorter than stock. I don't know much about the W-body axles, but it may be the same case as the N-body axles.
Regardless though, just because the W-body has a wider stance, does not necessarily mean the axles are a different length. The spindles/bearing assembly and tire offset all can change how wide a car sits.
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if I remember right I think lenko had to use the other front hubs also, meaning that his front and rear bolt patterns are different.
the best way I think is to take all 4 axles to a machine shop and tell them what you want, either they can re-spline the outer smaller to accomodate the J outer joint or have 2 new center shafts made up.
01 cav w/01 3400 gam gt 4t45e
Jo Mx... wrote:if I remember right I think lenko had to use the other front hubs also, meaning that his front and rear bolt patterns are different.
the best way I think is to take all 4 axles to a machine shop and tell them what you want, either they can re-spline the outer smaller to accomodate the J outer joint or have 2 new center shafts made up.
That's what I was talking about with using the N-body spindles. They use a different hub which changes your bolt pattern to 115 mm. I use straight N-body axles on my N-W-F-body swap.
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Lenko tried for a while to find axles and to make a few combos work, he ended up getting custom ones made.
It's true. I tried to use N-body axles, but they're too small like the J-body ones... same spline count (30? 32?) as the J-body too. The 4T65E-HD transmission that comes with the L67 supercharged 3800 uses really beefy axles... 34 spline if I remember properly... which is bigger than everything I looked at. But they were waaaay too long to fit in the Cav.. Different than the non-supercharged 3800 axles.. about a 1/4" thicker than them too. Either way, would have put the front wheels about 3" further out on each side...
I had the axle shafts custom made, 13" long both sides... and built the axles using the original CV's but with new boots, etc... used the C-body hubs and brakes... so I have 5x115mm on the front, and thanks to the N-body IRS have 5x115mm on the rear too. Didn't really matter though... my rims are dual bolt pattern.
^^^^^^ Alright. Thanks for clearing that up John.
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Anytime
I will eventually put together a new page on my swap... all the little details (I have nothing to hide!! and it's a hella fun swap!)... but right now I'm house-training our new puppy Moka (chocolate lab), so I have very little time to be on JBO
...j
