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  #16 (permalink)  
Old 01-30-2014, 07:24 PM
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Quote:
Originally Posted by jax_pap View Post
uh??? i never tried L/U in second. i only hold it in third while pullin a 3500 lb boat, but boat ramp is only 5 miles away and its only 45 mph zone. man, i was hopeing i had it right. it sure seems right, but i'm no tranny expert. after old cable, reinstalled, i ran it WOT 1-2, 2-3, it shifted at 4700 on its own. it would do that before the new converter install. what would i be looking for at WOT?????? i just want it to last, its my daily driver. thx, rick
Thats interesting that you dont have lockup in 2nd gear. The truck I had was a GMT-400 2wd longbox TBI 305/700r4 trans with 3.42's and it woudl lock up in 2nd gear.
I started from a stop selector in 1st gear, got some speed and revs, then shifted to 2nd and after a moment the revs came down a bit. Then if I kept the accelerator sleady with my right foot to stay ay cruise speed, I could tap the brakes and the TC would unlock when brake was depressed, TC locked back up after I let off the brake.
Of course the engine/trans has to be up to temp before the TCC will lock.

Try my method, I'm intrigued seeing that they are both 89 trucks.

peace
hog

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  #17 (permalink)  
Old 01-31-2014, 05:37 AM
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never tried it or paid attention to it in second, ill try it. yea, i know about being up to temp. the converter only locks up when temp gauge (mechanical) is 185 or higher. i run a 195 superstat in it. my sister n law has a 89' too. same motor, tranny, heads (187), but a 3.08 gear. she runs more highway then me. hers is only got 160,000 miles on it tho. i'll try hers in second too. her 305 has more low rpm torque then mime, but mine pulls harder 2500-4700 then hers. i'm gonna replace my timing chain and gears in a couple of weeks. i'd say its stretched and i'm loosin that low torque, but then again its got 317,000 on it. i checked comp on both engines last year, mine was 170-180, hers was 150-160, but hers has been negelected over the years by PO. i've been running seafoam thur oil & fuel at oil changes. its running better and getting 18 mpg. i'll let you know about the second gear lock up. thx, again rick
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  #18 (permalink)  
Old 01-31-2014, 05:51 AM
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hogg, i just read your other post about torque rating. thx, now i feel like a dumb***, lol. i paid more for less stall, lol. have a good day rick
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Old 01-31-2014, 04:41 PM
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hogg, here's here i came up with b29DCLF 2075 rpm stall. maybe i miseed something. but im happy with it. http://www.transparts.ru/pdf/tc_gm_03_web.pdf
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  #20 (permalink)  
Old 02-01-2014, 09:26 AM
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Yes by your chart you did right. Regardless, we are talking only a few rpm anyways. the reason you paid more was because you got a furnace brazed TC. You bought the right TC.

peace
Hog
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  #21 (permalink)  
Old 02-01-2014, 03:06 PM
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yea, really a WHOPPIN 50 MORE RPM..............HOLD ON!!!!!!!!!!!! when I drive it normal, it shifts just like the stock 1350. when at a dead stop, then go WOT, it stalls to 2500. that old tired 305 must be wore slap out. I tried the second gear lock up like you said, and it doesn't lock in second. shift selector in 1st, ran it up to 2500, shifted it to second, back up to 2500, steady cruise, temp was 195, flat road for 1/2 mile. it never locked. jus barely apply brake, and no change. then I put selector in second. took off normal, let it shift to second, rode second at 3000 for 1/2 mile, it never locked. i'll try my sister in laws truck (stock 1350 stall with lock up) when I get a chance. thx again rick.
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Old 02-02-2014, 10:17 AM
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If you are getting 2500rpm of stall that means your 305 is making good torque. More torque than what the TC's are rated with anyways.
With the same TC you have (but GM original) I get about 2800rpm with a vortec 350. Ebrake, service brake on hard, WOT jab in gear, 2800rpm.

Thats weird about the TCC in your 89, dont know why my 89 did and yours doesnt oh well. The torque converter wont affect the lockup, its either ECM or vacuum/speed controlled.

Is there a 2 prong electric plug on your trans or is their a standard mechanical cable coming from the tailshaft of your trans? Mine had the electric speedo drive.

I cant remember if my 92 did or or not, but I'm leaning towards only a 3rd 4th gear strategy.

peace
Hog
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  #23 (permalink)  
Old 02-02-2014, 12:37 PM
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nope, no speedo cable. a 2 wire plug back at tail shaft on drivers side. it seems to be a good lil converter. I like to watch that 2-3, & 3-4 shift only fall 200-300 rpm, lol. its working, I like it. cant wait to get that 355 (carbed) built for it, with some 3.90 gears.
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Old 02-02-2014, 06:35 PM
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this is the backlash of a stall coverter. you love when it stalls up into the power band and makes the tires break lose,whee fun fun fun but normal or part throttle driving your right in the slipage of the converter. no more barking tires wheni t shiftes to second or third because when it's shifting you fall back into the slip range of the converter. real bad when you have a tall gear.
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  #25 (permalink)  
Old 02-02-2014, 06:39 PM
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sorry ,last post is to wrong question.
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Old 02-02-2014, 06:46 PM
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you are feeling converter slipage. that is the downside of a stall converter. if you aren't winding the engine up past the stall speed. the converter will be sliping like it's suppost to
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Old 02-02-2014, 06:50 PM
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the last two post are to jax pax's question
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  #28 (permalink)  
Old 02-03-2014, 08:06 AM
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yea, I see that converter slippage. I always try run it out of the slippage when shifting. with the stock converter, I would let it shift at 1700-1800 then fall down to 1300-1400 after lock up in o/d. that was my 45 mph speed limit to work. now with this new converter it runs up to 2200-2300 shifts, and falls back to 1300-1400 when converter locks in o/d. I still got my 45 mph speed, it just gets there quicker now. the lil 305 likes the extra rpm. it doesn't feel like I'm luggin it any more, and got lil more snap when Im cruising around 1700-1800 and hit it real quick, it gets up out of the way now. poor lil 305, its served its purpose. I'm constancley checking temp, on converter, pan, and cooler. so far its always under 150 degrees. the converter always hotter, but never over 150, even when I leave it in 3rd sometimes to and from work. 12 miles one way, 3-4 stop signs, hilly, 45-55 mph zones. I think its gonna be just fine, but there I go thinkin again, lol. thx, rick
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Old 02-04-2014, 10:26 AM
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Ypou'll be fine, I put over 200,000 kms on tthe same exact TC with a Vortec 350 in front of it. I beat the hell out of it. Just remember its a stock TC, no need to worry about it. That engine sees WOT many times its out and it was daily driven for years.

peace
Hog
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