MC1of80

Hi all. Lucas high performance/heavy duty 80w-90. And the GM additive that were purchased on Amazon.

Also keep in mind that the anemic 180 hp 305s in the 84-88 Monte Carlo Ss's had the 200r4 and 3.73s in them from the factory. And they cruise down the highway with no problems. Same for the olds 442s and Hurst olds- 200r4 and 373s. The GM had 200r4 and 3.42s. Not the 83 MC SS. They had th350s and 3.42 gears. Just some food for thought.

Hey Aaron. Sorry that the 70 trans is giving up the ghost. I still feel what was suggested above and what you said is the way to go. Since the 70 is a one legger, non posi, may I suggest the posi, gear, bearing combo on eBay. I myself just purchased this combo and had it installed. I got the kit with a trutrac and 3.31s but it is also available with the Eaton style posi and any ratio you like The "guy" that did the work, a friend love known since I was a wee lad asked where I got the parts. I thought maybe something was bad. He said that they were quality parts and the gears set up real easy with a great pattern. He owns a chassis shop and has created some of the fastest and quickest cars in the north east.

As I'm sure you know, check the backspacing on your buddy's "in stock" rims. Lol This time I am running Lucas 80-140w I believe. I will recheck tomorrow. No additive due to the fact that I am running a Detroit Tru Trac. No friction from clutches or cones. So no additive needed. I highly recommend it! I have destroyed factory Eaton, moroso brute strength, strange posi units through out the years, and I mean destroyed! Lol The only car in our fleet that doesn't either have a spool or a Detroit Tru Trac is my son's Monte. That will be getting the now "in stock" Moser axles with 2in long 1/2 studs. It has a clutch type eaton posi which will get the same Lucas oil with GM posi additive. For me the GM additive is the best. Have tried many others and also fluid that supposedly had it. Poor results compared to the GM stuff that ultimately was added.

I just had strange axles installed in my 12 bolt. All A-body 12 bolts from 68-72 use the same length 30 spline axles. The 64-67 12 bolts are 1" shorter so the axles don't work. The strange axles and the Moser axles that were removed had both 7/16 holes for press in studs and 1/2 threaded holes for the screw in studs. I highly recommend the strange axles. Have 3 sets in 3 different 12 bolts. No issuses whatsoever.

Yes, all 3 years are the same. Like 1970mcss stated. I personally installed the Chevelle steel front fenderwells in my 70 SS.

That is the correct pump for a 71. Big block or small block. Just difference in brackets.

Hey Jerry. I'm sorry, I read your dm to me and I haven't responded. 😞 I still haven't decided what to do about it yet. It still seems to be leaking slightly. I will keep you in mind if I swap it out. Sorry to hear about your damaged radiator.

I think they are also. Just make sure if you do get them and install them you MUST have at least a 15x7 rim. They don't seat on a 15x6 which was the standard rim.

Lol all good, ask away. I am using a driveshaft loop that bolts between the trans mount and transmission. I didn't want to drill holes in my virgin, solid floorboards. I did have to get a shorter trans mount to keep the geometry correct. Summit sells them.

No, the only thing I had in stock was the 12 bolt. Lololol had to purchase everything else. Lol

So today I decided to tackle the power seat. When looking for a build sheet when we first got the "barn find" we found the front bolt on each side broken. Well after much heat, penetrating fluid and cursing l am proud to say... It didn't work. Lolol Next, ole reliable... Drill bits. Drilled and retapped the front bolts and reinstalled the seat. Operation a success!¡! Lol And no build sheet under the rug either. 😞

Hey Mark. I honestly would recommend the same exact parts I had installed in my 12 bolt. This identical rear is in the 70 SS as we speak. Has many 1/4 mile passes on it without an issue. I use 275 60 r15 drag radials. So far best of 11.22@ 120. If you look at the pics I also had the rebuilder weld the axle tubes to the center section. The factory 4 rosette welds are marginal at best. Our cars are heavy compared to most others and I also recommend the 1/2 studs. I use 2" version to be able to put the rally rim derby caps on. Any longer and you cannot.

You're very welcome!

We used a Monte Carlo SS 83-88 steering box, that was in "stock", in my son's car. All we changed was the rag joint and the pressure hose. Handles nice!

My son today decided he wanted to strip and paint some old Lakewood slapper bars that came on my 71 402 4speed when we purchased it. He wants an old school look. Lolol They came out very good.

Hello all. One of todays projects.... Had the original 12 bolt for my 70 SS rebuilt with a Detroit Tru Trac, 3.31 gears new bearings, seals, strange axles with 1/2 x 2 studs, 1350 u-joint yoke, upper bushings and carrier bearing studs, new brake shoes,backing plates, wheel cylinders, hardware and new drums also. Built identical to the 12 bolt that is in the 70 SS now. Why you ask? Lol well... The rear just built is the original, #s matching rear for the 70. The 71 "barn find" had it's 12 bolt plucked from it many years ago. No one knows when, where or why. So the rear from the 70 will be transplanted into the 71. Yes, all that work for some numbers on an axle tube. Lololol Anyhow, lol I spent most of the day cleaning it up, getting ready for some paint. For anyone interested I have the original 12 bolt posi 2 series carrier that is available. Don't want to ship though. Very heavy. Also has ok 3.73 gears on it with a spacer/adapter.

Sorry, had a brain fart! Lolol my 71 "barn find" has power windows. Just took this pic...

For the price for new castings, you can't go wrong. I will be using those exact pieces when I get back to restoring my 71 402 4speed. I have gotten many parts from ground up for my/our various Montes and the parts have always been top notch!

Welcome to the madness Doug! Great looking Monte! Did you paint it yourself?

Panels are different pattern but switch location is the same. Like MCfan said, the power windows switch takes the place/ same location as the manual crank location.

Hey Mike. The can is 10024z and the quart is 10024zp. OEM finish. Semi/ eggshell. Hope this helps.

I used and have great success with Eastwood under hood semi black. Holds up extremely well and durable.

That's the color of my 71 402 4speed. I hope it comes out as beautiful as yours!

The "slap stick" detent plate that Dan makes are the bomb! Have it in my 70 SS, love it!!! Highly recommend!