RPO Code 1SD
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Joined: Aug 2008
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From: Short Summer, VT
Car: 1985 Trans Am T-Top
Engine: 305 TPI
Transmission: T-5 5 Speed
Axle/Gears: 3.42 posi 1LE 10 bolt
Re: RPO Code 1SD
Scott, I noticed PE group 3 includes "halogen low and high beam" , what was the base headlight?
Re: RPO Code 1SD
Non halogen. Halogen was new in the 80's and was a marketing detail for better lighting. Standard headlights were the norm. With everyone so used to the term Halogen these days, most people have probably replaced their standard lights with them and never knew there was a lesser lighting option.
Supreme Member
iTrader: (1)
Joined: Aug 2008
Posts: 1,485
Likes: 5
From: Short Summer, VT
Car: 1985 Trans Am T-Top
Engine: 305 TPI
Transmission: T-5 5 Speed
Axle/Gears: 3.42 posi 1LE 10 bolt
Re: RPO Code 1SD
Thanks! I remembered all my cars in the 80s had halogen sealed beams, guess I just assumed halogen had been around longer than that. Non halogen third gen lights must have really sucked!
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Joined: Aug 2003
Posts: 944
Likes: 13
From: Crest Hill, IL
Car: 1989 GTA Trans sold :(
Engine: 350 TPI L98 (B2L)
Transmission: TH700 R-4
Axle/Gears: 3.27
Re: RPO Code 1SD
from my experience, the non halogens were indeed low emitted lighting systems. Halogens were a "reflected" upgrade as the beam projection from the inside element was more intense and had a reflector to bouce back the light from the rear of the shell of the housing and back thur the glass making the viewing area more bright on the roads at night.
However, there are better sources now, and not those annoying intense high energy discharge designs....(in some states they're illegal)....
I end up buying from halogen, the "true view" design which the light was much more softer illumination but the distance of view was greater. I recommend doing this to any of our thirdgens for better vision and futher clarity. It's still a bit pricy but worth the price. Thinking they cost around 21 or 22 bucks each...haven't bought them in awhile...
However, there are better sources now, and not those annoying intense high energy discharge designs....(in some states they're illegal)....
I end up buying from halogen, the "true view" design which the light was much more softer illumination but the distance of view was greater. I recommend doing this to any of our thirdgens for better vision and futher clarity. It's still a bit pricy but worth the price. Thinking they cost around 21 or 22 bucks each...haven't bought them in awhile...
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