`89 K2500 700r4 Q? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**special-K** · 12-08-2007, 12:21 PM

I can get this trans from a guy near me.Is it computer controoled from an`89 6-lug K2500?What all should I be sure to get?I want to put this in a`72 K2500.What would it be work?Nothing known on condition,I would rebuild.

MylilBowTie · 12-08-2007, 02:10 PM

I don't think that transmission is new enough for a transmission controller. It should have the lockup torque convertor. I know there are a few parts that are used for the lockup torque convertor. I'm not sure what they are though. I'm thinking one or two are on the firewall with vacuum connections. One is near the brake pedal.

robin58 · 12-08-2007, 05:55 PM

700R4 wouldn't be computer controlled. Make sure you grab the tv cable and bracket to make it easier to hook up.

**special-K** · 12-09-2007, 06:22 AM

I know he cut the cable

but hopefully has the bracket.I`d be able to get the cable from GM,right?What does this hook up to?I`d be installing in a carbbed truck.

piecesparts · 12-09-2007, 07:55 PM

The 700 R4 will have a power wire hook up for the lock-up converter. That can be connected to an aftermarket switch to control that or you can set the tranny up to bypass the lockup converter and put in a NON lockup torque converter. I run a 700 R4 in my truck WITHOUT the lockup and I still get the overdrive function--JUST NOT the lockup feature.

For wiring hookup there are places like "Bowtie Overdrive" and "Street and Performance" that has info to connect.

The TV cable conncts to the side of the carb just like the "Kickdown cable" on an older TH350 tranny. However, the TV cable is TOUCHY in it's length adjustment. It is important that you get the setting right or the tranny will burn itself up over a short time. TV cables can be purchased from many sources (tranny shops, GM, Bowtie Overdrive, Jet transmissions, and other outlets).

MylilBowTie · 12-10-2007, 01:19 AM

What are the advantages of not running lockup? I thought that was another benefit of the 700r4 helping net better gas mileage.

piecesparts · 12-10-2007, 10:33 AM

Quote:

Originally Posted by MylilBowTie

What are the advantages of not running lockup? I thought that was another benefit of the 700r4 helping net better gas mileage.

There ARE no REAL benefits to not running a lockup convertor OTHER than not dealing with the lockup feature and having to wire it into a switch somewhere. I run a NON lockup so that I can put a stall ocnveter in my truck that supports the cam that I have in the 383 stroker motor. I have a fairly healthy lope to the motor and the stall converter allows for decent driving and stopping at stoplights.

The lockup will give some edge to the fuel mileage, but it is not a deal ender for me. The overdrive and the lower first gear was the selling point for my purchasing this OD tranny without the lockup. It would be an alternative to your not hooking it up. However in your case the wiring setup is rather simple to find in the market.

Please disregard the attachment the one I wanted to attach was almost the same name and I got the wrong one.

Go to Street and Performance's website with the attached link and check out the tech article for wiring a lock-up.

http://www.hotrodlane.cc/NewTPI%20li...ks%20page.html

jeffspower · 12-10-2007, 10:44 AM

Highway gears &/ or towing without lockup will burn up the tranny. It makes the converter "work" continuously, like your were powerbraking it. You will probably need the TV bracket & cable from an older carbed truck. I think the TBI setup is different. Cable should be available thru "help/ Dorman" at a parts store.

jeffspower · 12-10-2007, 10:53 AM

Oh yeah, the output shaft will be too long for your NP205. You can get an aftermarket case spacer, or I think a custom shaft that won't need a spacer. Even without the spacer, the 700R4 case is longer, so you will have to move the crossmember back, rework the driveshafts, and possibly a little T- case shifter tweaking to get it to come thru the floor right.

piecesparts · 12-10-2007, 11:22 AM

Quote:

Originally Posted by jeffspower

Highway gears &/ or towing without lockup will burn up the tranny. It makes the converter "work" continuously, like your were powerbraking it. You will probably need the TV bracket & cable from an older carbed truck. I think the TBI setup is different. Cable should be available thru "help/ Dorman" at a parts store.

That is why you have to purchase a NON lockup converter.

jeffspower · 12-10-2007, 12:07 PM

Quote:

Originally Posted by piecesparts

That is why you have to purchase a NON lockup converter.

As long as you stay with a very low stall speed for the applications I'm talking about, and stay well above that speed while cruising. A 700R4 in a heavy 4x4 without lockup isn't the best idea IMO.

MylilBowTie · 12-10-2007, 02:29 PM

They do sell high stall convertors that lockup. Though I'm pretty sure they are costly. Thanks for answering my question.

piecesparts · 12-10-2007, 04:04 PM

At no time; would I say his appllication (4X4 and towing) for a NON lockup would work. The older trannies from Premier Performance (Now known as JET transmissions) had the lock up feature removed. I purchased two trannies from them in the nineties and since then built them to be tougher than what they sold back then. I have no issue with the NON locking feature, other than the fact that I "Might" gain a small amount of fuel economy from the lock up. I had a 350C tranny give some problems long ago and the lock up converter was unplugged for a short time and the change was worth approximately 200 RPMs on the highway. The gain from this would be minimal but at $3.00 a gallon noticeable. I do still get 15 MPG with my 383 stroker motor and the 2400 stall converter in my tranny. The overdrive allows me to be around 2500 RPMs at 70 MPH and just about 3000 RPMs at speeds closer to 100 MPH---I can't complain. The Mustangers do though...

12-08-2007, 12:21 PM	#1
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	`89 K2500 700r4 Q? I can get this trans from a guy near me.Is it computer controoled from an`89 6-lug K2500?What all should I be sure to get?I want to put this in a`72 K2500.What would it be work?Nothing known on condition,I would rebuild. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

12-08-2007, 02:10 PM	#2
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: `89 K2500 700r4 Q? I don't think that transmission is new enough for a transmission controller. It should have the lockup torque convertor. I know there are a few parts that are used for the lockup torque convertor. I'm not sure what they are though. I'm thinking one or two are on the firewall with vacuum connections. One is near the brake pedal. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

12-08-2007, 05:55 PM	#3
robin58 Registered User Join Date: May 2007 Location: Louisiana Posts: 763	Re: `89 K2500 700r4 Q? 700R4 wouldn't be computer controlled. Make sure you grab the tv cable and bracket to make it easier to hook up.

12-09-2007, 06:22 AM	#4
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,859	Re: `89 K2500 700r4 Q? I know he cut the cablebut hopefully has the bracket.I`d be able to get the cable from GM,right?What does this hook up to?I`d be installing in a carbbed truck. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

12-09-2007, 07:55 PM	#5
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: `89 K2500 700r4 Q? The 700 R4 will have a power wire hook up for the lock-up converter. That can be connected to an aftermarket switch to control that or you can set the tranny up to bypass the lockup converter and put in a NON lockup torque converter. I run a 700 R4 in my truck WITHOUT the lockup and I still get the overdrive function--JUST NOT the lockup feature. For wiring hookup there are places like "Bowtie Overdrive" and "Street and Performance" that has info to connect. The TV cable conncts to the side of the carb just like the "Kickdown cable" on an older TH350 tranny. However, the TV cable is TOUCHY in it's length adjustment. It is important that you get the setting right or the tranny will burn itself up over a short time. TV cables can be purchased from many sources (tranny shops, GM, Bowtie Overdrive, Jet transmissions, and other outlets). Last edited by piecesparts; 12-09-2007 at 08:01 PM.

12-10-2007, 01:19 AM	#6
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: `89 K2500 700r4 Q? What are the advantages of not running lockup? I thought that was another benefit of the 700r4 helping net better gas mileage. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

12-10-2007, 10:44 AM	#8
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: `89 K2500 700r4 Q? Highway gears &/ or towing without lockup will burn up the tranny. It makes the converter "work" continuously, like your were powerbraking it. You will probably need the TV bracket & cable from an older carbed truck. I think the TBI setup is different. Cable should be available thru "help/ Dorman" at a parts store. __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

12-10-2007, 10:53 AM	#9
jeffspower Well, Whoop-dee-do! Join Date: Mar 2003 Location: Easton, Mo. pop.- me & scarcely a few others Posts: 2,302	Re: `89 K2500 700r4 Q? Oh yeah, the output shaft will be too long for your NP205. You can get an aftermarket case spacer, or I think a custom shaft that won't need a spacer. Even without the spacer, the 700R4 case is longer, so you will have to move the crossmember back, rework the driveshafts, and possibly a little T- case shifter tweaking to get it to come thru the floor right. __________________ '68 GMC shortbox 4x4 350/SM465/T221- bought it in '83 SOLD '72 K20 500 Cad/TH400/NP205 SOLD '92 Chevy 2500 6.5 mech TD 4L80E crusty daily driver '72 Monte Carlo... sweet low mile toy '11 Dodge Challenger IE 392 6spd... midlife car

12-10-2007, 02:29 PM	#12
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Re: `89 K2500 700r4 Q? They do sell high stall convertors that lockup. Though I'm pretty sure they are costly. Thanks for answering my question. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

12-10-2007, 04:04 PM	#13
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: `89 K2500 700r4 Q? At no time; would I say his appllication (4X4 and towing) for a NON lockup would work. The older trannies from Premier Performance (Now known as JET transmissions) had the lock up feature removed. I purchased two trannies from them in the nineties and since then built them to be tougher than what they sold back then. I have no issue with the NON locking feature, other than the fact that I "Might" gain a small amount of fuel economy from the lock up. I had a 350C tranny give some problems long ago and the lock up converter was unplugged for a short time and the change was worth approximately 200 RPMs on the highway. The gain from this would be minimal but at $3.00 a gallon noticeable. I do still get 15 MPG with my 383 stroker motor and the 2400 stall converter in my tranny. The overdrive allows me to be around 2500 RPMs at 70 MPH and just about 3000 RPMs at speeds closer to 100 MPH---I can't complain. The Mustangers do though...



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