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#1 |
Registered User
Join Date: Mar 2015
Location: Portsmouth
Posts: 123
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91 crewcab...got a couple questions
So I'm going to look at a 91 crew cab 2wd dually tomorrow...few things I'm wondering....the truck has a tbi 350 with 700r4 does this sound correct for a one ton truck...I figured it would have a th400 or 4 spd and more than likely a bbc under the hood. But those arnt my main concern..can anyone tell me what size brake lines this truck would have on it? Has a small leak and plan on fixing it. The truck isn't that far from me but I don't have any one with a truck big enough to haul a 1 ton crew cab long bed lol. Hopefully I can get a couple compression fittings a piece of line and bring this thing home tomorrow.
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#2 |
Registered User
Join Date: Nov 2015
Location: Down south
Posts: 518
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Re: 91 crewcab...got a couple questions
You can probaly buy brake lines pre bent. I can't be sure about the transmission. Though I believe 700r4s were mostly intended for 1/2 tons, but I've heard of heavier trucks having them anyway,though people who really uses these trucks change them out to the heavier duty th400.
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#3 |
Registered User
Join Date: Aug 2007
Location: charlestown maryland
Posts: 272
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Re: 91 crewcab...got a couple questions
Dont use a compression fitting replace the rotted line and do it right. Those compression coupler fittings are not designed for brake system pressures. You can always buy a couple lines and if theres any extra length loop it. And if it has overdrive it may have a 4l80e and if it does you lucked out i think they were only available in the late model one tons. If it has a 700r it was probably swapped in but i could be wrong
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#4 |
Registered User
Join Date: Mar 2015
Location: Portsmouth
Posts: 123
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Re: 91 crewcab...got a couple questions
Well after talking to the owner it's the rubber brake line on the front so I'll just change it out no big deal there....and I'm assuming it's got a 4l80 in it I do believe that's what comes in it factory I'd say the owner just dosnt know enough and that they assume it's a 700 because it has overdrive...only time will tell I'm going to look at the truck tomorrow.
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#5 |
Registered User
Join Date: Dec 2011
Location: Regina, SK, Canada
Posts: 622
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Re: 91 crewcab...got a couple questions
91 did have the 4l80e.
__________________
1979 Chevy Dually Crew 4X4 454, D60 Tru-trac, D70 Detroit Locker, 3.73, 4L80E/NP205 1971 GMC 3/4 Ton 4X4 |
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#6 |
Registered User
Join Date: Nov 2015
Location: Down south
Posts: 518
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Re: 91 crewcab...got a couple questions
I doubt someone would put a 700r4 in it, that wouldn't make any sense. Either it has a factory 700r4, or some other overdrive transmission. The only way to tell is to crawl under the truck and look. The shape of the oil pan, and number of bolts will tell you.
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#7 |
Registered User
Join Date: Nov 2015
Location: Down south
Posts: 518
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Re: 91 crewcab...got a couple questions
One thing I forgot to say is if you look up the VIN, you'll know what transmission it left the plant with.
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#8 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,132
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Re: 91 crewcab...got a couple questions
Yes & no. Someone would put a 700r4 in one to save a few bucks & still have OD. 4l80e's are more expensive & 700r4's are more obtainable.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#9 |
Registered User
Join Date: Mar 2015
Location: Portsmouth
Posts: 123
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Re: 91 crewcab...got a couple questions
Well the verdict is in....it does have the 4l80. Trans..truck fired right up and sounded good. Didn't pull the trigger on it though..it needs more than just brake lines to be driven home 4 of the 6 tires are shot and I just don't have the time to mess with it right now. I leave for out of town work in 2 days..also the small block that was in it was tbi but it didn't have center bolt valve covers so I'm guessing. It had a engine swap at one point in time....I could be wrong. But for a 91 model truck I figured it would have the newer style heads
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#10 | |
Registered User
Join Date: Apr 2009
Location: Pflugerville, TX
Posts: 594
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Re: 91 crewcab...got a couple questions
Quote:
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#11 |
Registered User
Join Date: Mar 2015
Location: Portsmouth
Posts: 123
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Re: 91 crewcab...got a couple questions
You could be correct. I just assumed it would have the earlier vortec style center bolt heads. Lol
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