Author Topic: chevy 4.3 guys (Read 7564 times)

Nothingface5384 · « **on:** Nov 29, 2008, 03:28:06 PM »

hey, just curious to what the 4.3 auto guys are running for gears with a 15x8 / 35x12.5x15s?

would 4.88s be too low are should I look for some 4.56 or even 4.30s

truck will be drivin 3 or 4 days a week and wheeled whenever i get my buddies together( could be once a weekend or once a month...whenever we have time)

think i've giving up on the rebuilt 22re..and will definstly be happier with as v6 and

i could actualy work on(pushrod engine)

AaronB · « **Reply #1 on:** Nov 29, 2008, 03:45:52 PM »

4.88's will be perfect

79coyotefrg · « **Reply #2 on:** Nov 29, 2008, 04:48:53 PM »

my buddy Jason runs a 4.3 TBI and 700R4, into toy cases, runs 35 BFG's and he has 5.29's i'm pretty sure.

maybe start out with 4.10's and see just how sluggish it is

Nothingface5384 · « **Reply #3 on:** Nov 29, 2008, 04:57:02 PM »

naw...not made out of money lol..i have 4.30s right now

NorCalToy · « **Reply #4 on:** Nov 29, 2008, 06:13:38 PM »

i think what glen means is start with your stock gears, which he assumed was 4.10s, and then if its too sluggish get what you think will be necessary. you should have a better idea of what you need after youve tried it with your 4.30s, if its horrible go for 4.88s or 5.29s, if its ok but still too sluggish for you go for 4.56s or 4.88s, or keep your 4.30s if it works fine.

bigarms23 · « **Reply #5 on:** Nov 29, 2008, 07:35:21 PM »

the few friends of mine that did the 4.3/700 combo run 488s with tire sizes from 36s to 40s

Nothingface5384 · « **Reply #6 on:** Nov 29, 2008, 08:02:45 PM »

thanks guys, i think i may go 4.88s after checking the calculator on ringpinon.com
i would just use my stock 4.30s but really cant since i'm actually going to put the 85 sfa in my garage to use...and it needs a 3rd member

thinking about putting a v6 third in the front and keep my 4cly 3rd in the rear
i know tghe ideal combo is a v6 rear and hi 4 up front...but aussie still doesnt make a v6 unit and the hi pinon 3rd probably goes over a 100 used.. let aloat a 285 new empty houseing..

4XFlyin · « **Reply #7 on:** Nov 29, 2008, 09:48:31 PM »

I run 4.88, 35's and 4 spd auto. Love the combo.

COToy91 · « **Reply #8 on:** Nov 29, 2008, 09:52:06 PM »

4.88's
37"'s 700r4 toy case

nvtoyin21 · « **Reply #9 on:** Nov 29, 2008, 09:54:12 PM »

Im running the 4.3 with 4.88s. works great for me on the road. then I got the duals for crawling! oh ya, on 37s too

4RunnerChevy · « **Reply #10 on:** Nov 30, 2008, 05:55:52 AM »

4.3 Vortec / 700R4 / 4.88's / 36" Tires, Bigarms23 was talking about. Shift point is about the same as it was in the s-10 blazer (stock) it came out of. Your gonna want to be 4.88 or 5.29 in the end cause your gonna want a bigger tire (37's).

Nothingface5384 · « **Reply #11 on:** Nov 30, 2008, 10:11:39 AM »

i got a lead on a 93 cpi? 4.3 with 700r4...and i plan to use a np-205 xfer case(pass drop)....do i need any special adapter to mount it to a 7004r?
sometimes i come acroess adds saying they have the adapter for a th350 or th400?

notajeep · « **Reply #12 on:** Nov 30, 2008, 12:46:31 PM »

I run a 89 tbi 4.3 and I have 4.10's. But no overdrive, so I top out at about 65mph or so. (That is a guess since I have no speedo.) (and not that I could drive it down the highway anyway.)

COToy91 · « **Reply #13 on:** Nov 30, 2008, 02:01:56 PM »

Quote from: Nothingface5384 on Nov 30, 2008, 10:11:39 AM

i got a lead on a 93 cpi? 4.3 with 700r4...and i plan to use a np-205 xfer case(pass drop)....do i need any special adapter to mount it to a 7004r?
sometimes i come acroess adds saying they have the adapter for a th350 or th400?

it is prolly not a 700r4, the last year for that was in early 1992. It is prolly a 4l60E and look on AA site or call them

Nothingface5384 · « **Reply #14 on:** Nov 30, 2008, 03:15:22 PM »

well its the same transmission...just renamed and i guess electronicly controlled?...manual valve body will take care of that
and will do

crawlerdan · « **Reply #15 on:** Nov 30, 2008, 03:23:50 PM »

toybuilt is runnig a granny 4spd with 4.56s and 40s. does really well, and can still do over 90mph

COToy91 · « **Reply #16 on:** Nov 30, 2008, 03:32:07 PM »

Quote from: Nothingface5384 on Nov 30, 2008, 03:15:22 PM

well its the same transmission...just renamed and i guess electronicly controlled?...manual valve body will take care of that
and will do

It became the 4l60 in 1990 to 1992. And i dont think you can put a manual valve body in it. You need either the computer from the car it was in or a separate trans controller

Nothingface5384 · « **Reply #17 on:** Nov 30, 2008, 03:42:04 PM »

oh ok..well i believe it has the electronics and stuff...if not i can always get a howell or painless setup

so i guess the next step is finding out how to mate a np205 to a 4l60e

COToy91 · « **Reply #18 on:** Nov 30, 2008, 03:52:05 PM »

you will need either this http://www.tciauto.com/Products/Electronics/default.asp

or like you said a harness set up for that tranny, i recommend howell

Nothingface5384 · « **Reply #19 on:** Dec 02, 2008, 06:45:10 PM »

still pretty sure you can get a trans go shift kit with full man valve body (ditch the electronics)along with a cable to lockup the torque converter..

4RunnerChevy · « **Reply #20 on:** Dec 13, 2008, 08:47:39 AM »

If you get the CPI, save yourself headaches and replace the regulator (prone to failure) and get the nut kit (for the injector to poppet valves (also prone to failure). You most likely you will have the reworked 700R4 electronic tranny (my 92 has the 700R4). I would personally get the stock harness and rework it, more time but less exspensive, if you do it right, the computer will control lock-up. If your in Cali and want to keep it legal then make sure you have smog stuff and VSS. If your going with Howell, then get your CPU reflashed so you wont have to worry about VSS. There are many theories on VSS, and what it does for a GM. I would keep the VSS (NP205 ?) cause you can mod the ALDL for tire size

. Why go with the NP and not an adapter to Toy T-case ?

Nothingface5384 · « **Reply #21 on:** Dec 13, 2008, 09:28:14 AM »

yea, i'll be picking up a 93 4.3 with matyching tranny..not sure if its cpi but its definatly not tbi

i was asking that i n my other thread about what xfer case to go with...toy adapter is more expensize, but making an np205 work with a 700r4 sounds like a pain in the ass

pumkin toy · « **Reply #22 on:** Dec 13, 2008, 09:37:56 AM »

Quote from: 4runnerchevy on Dec 13, 2008, 08:47:39 AM

If you get the CPI, save yourself headaches and replace the regulator (prone to failure) and get the nut kit (for the injector to poppet valves (also prone to failure). You most likely you will have the reworked 700R4 electronic tranny (my 92 has the 700R4). I would personally get the stock harness and rework it, more time but less exspensive, if you do it right, the computer will control lock-up. If your in Cali and want to keep it legal then make sure you have smog stuff and VSS. If your going with Howell, then get your CPU reflashed so you wont have to worry about VSS. There are many theories on VSS, and what it does for a GM. I would keep the VSS (NP205 ?) cause you can mod the ALDL for tire size . Why go with the NP and not an adapter to Toy T-case ?

when you say replace the regulator do you mean the fuel pressure regulator? just wondering because i have a cpi 4.3 i want to swap in my 84 toy, i just need to get my 20r/22r hybrid engine sold first!

4RunnerChevy · « **Reply #23 on:** Dec 13, 2008, 09:50:20 AM »

If its a 93, It probably is a CPI motor.

Yes the fuel regulator. If you pull the cover on the intake and its clean then you have a fuel leak. Youll notice it in the mileage. I dont remember the part number but you can get em a NAPA and they come with the security torx bit. This is a common problem with the CPI, and might as well just get a new one before you tear into it. Not a big deal, like $40 bucks. Heres a write-up.

http://s10planet.com/forum/showthread.php?t=4695

As far as VSS if your gonna run a 700R4, with a toyota case then the only VSS that is smog legal with an EO number is from JTR/Stealth conversions, and have a two month lead time. The Downey VSS is not legal in California.

http://www.jagsthatrun.com/V8-chapters/V8-tpi-Speed-Sensors.pdf

and Stealth conversions

http://www.jagsthatrun.com/SpeedSensors_Order.html

Its a good Idea to read JTR entire swap manual, before doing any motor conversion.

pumkin toy · « **Reply #24 on:** Dec 13, 2008, 09:54:34 AM »

thanks for all the info!! yes i am going to run a 700r4 with toyota cases. and i dont really care about smog legal or any of that jazz, i live in south dakota and we dont really have any smog laws.

4RunnerChevy · « **Reply #25 on:** Dec 13, 2008, 10:03:51 AM »

Nice then you have less to worry about. Make sure your brakes are very good. The auto in low/low might drive you forward even with your brakes are on.

pumkin toy · « **Reply #26 on:** Dec 13, 2008, 07:40:53 PM »

yeah my brakes are pretty good now, i have the bigger drums in the rear and i deffinately want to do the v6 calipers up front. my dad had a really built fj40 with a 400 small block and 700r4, it deffinately pushed in low range!!

Nothingface5384 · « **Reply #27 on:** Dec 14, 2008, 08:40:21 AM »

hmm...good reason to convert the rears to disc

4RunnerChevy · « **Reply #28 on:** Dec 14, 2008, 08:45:36 AM »

There are many good reasons to go rear disks, this is just one of them.

Nothingface5384 · « **Reply #29 on:** Dec 14, 2008, 08:47:53 AM »

yea, i was already thinking about converting due to having 35s in the near future..

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